Report a sighting These include the great hammerhead (Sphyrna mokarran), the smooth hammerhead (Sphyrna zygaena) and the whitefin hammerhead (Sphyrna couardi) . It is found abundantly in depths of 1600 feet (500 meters) and is also often found in shallower waters of about 80 feet (25 meters). We use cookies to personalise content for you and to analyse our traffic. Instrument deployments and fin measurements. Size and shape. The great hammerhead is the largest of all. Blog Dandk October 14, 2018. The Scalloped Hammerhead Shark has a circumglobal distribution in tropical and warm temperate seas between 45°N to 34°S, but occurs more frequently at higher latitudes during the warmer months. As you might guess by its name, the great hammerhead (Sphyrna mokarran) … Scalloped Hammerhead pups held captive for research purposes in a shallow pond at Coconut Island often darken noticeably after … They are a timid shark and not considered dangerous to humans. This shark’s fins are highly valued and they are being increasingly targeted in some areas in response to increasing demand … The wide, hammer-shaped head gives these sharks their common name, and the scalloped hammerhead is named for the notches found along the front edge of its head. They are sensitive to light and because of their enhanced social behavior, these sharks are found closer to shore lines during the day and mostly remain in deep seas during the night. SIZE At birth, the shark is 1.4 to 1.8 ft [42 to 55 cm]. Males mature at 4.6 to 5.4 ft [140 to 165 cm], and females mature at approximately 7 ft [212 cm]. Scalloped hammerheads sharks are among the most threatened highly migratory sharks. Scalloped hammerheads are found in inshore (even in bays and estuaries), water about 900 feet (274 meters) deep. No regional fisheries management organization monitors take of this species, and management of international trade of scalloped hammerhead products is virtually non-existent. The scalloped hammerhead (Sphyrna lewini) can also reach lengths of more than 13 feet (4 meters). The most recognisable feature of these sharks is the ‘hammer’ on the head, with eyes and nose located at the tips of these extensions. DISTRIBUTIONScalloped hammerhead sharks are found world-wide in warm temperate and tropical seas. Overfishing, Large scalloped hammerhead sharks also eat small-sized shark species such as the Atlantic sharpnose shark (Rhizoprionodon terraenovae) or the blacktip reef shark (Carcharhinus melanopterus). The most distinguishing characteristic of this shark is it's "hammer-shaped" head. The Scalloped Hammerhead was always the most common Hammerhead Shark around. The young get their way to come out when finding the preferable season and conditions. To save our hammerheads, we must implement stronger levels of protection for them and reduce fishing pressure. They are threatened by commercial fishing, mainly for the shark fin trade. Beach goers, divers and anglers might get a lucky chance of seeing a scalloped hammerhead swimming close to shore. Its maximum length is to 12 to 13.8 ft [3.7 to 4.2 m]. Reproduction – Scalloped hammerhead sharks have long gestation periods (8 to 12 months), and bear litters of only 14 to 26 pups. The small size of the total activity space utilized by the Scalloped Hammerhead pups at Kaneohe Bay suggests it provides a healthy foraging base for the growing sharks. Within the Galapagos Marine Reserve, scalloped hammerheads are protected by law and, in 2007, Ecuador issued … Internet Explorer lacks support for the features of this website. Foreign, In 2019, NMFS announced its intent to conduct a 5-year review for the four distinct population segments (DPSs) of the scalloped hammerhead shark (Sphyrna lewini): Eastern Atlantic DPS, Eastern Pacific DPS, Central & Southwest Atlantic DPS, and Indo…, In response to a petition submitted by WildEarth Guardians and Friends of Animals, we, NOAA Fisheries, are issuing a final determination to list the Central and Southwest (SW) Atlantic Distinct Population Segment (DPS) and the Indo-West Pacific DPS of…, We, NOAA Fisheries, find that there are no marine areas within the jurisdiction of the United States that meet the definition of critical habitat for the Central and Southwest (Central & SW) Atlantic Distinction Population Segment (DPS), Indo-West…, Stay informed of all the latest regional news around NOAA Fisheries, How Our Shark Finning Ban Helps Us Sustainably Manage Shark Fisheries, U.S.-Caught Sharks Are a Sustainable Food Choice, Status Review Report for Scalloped Hammerhead Shark (Sphyrna lewini), Apex Predator Publications and Reports - Scalloped Hammerhead Shark, NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION, Report a Stranded or Injured Marine Animal, we listed four distinct population segments, Notice of Initiation of 5-year review; request for information (84 FR 46938, Se…, Scalloped Hammerhead Shark 5-Year Review (2020), Listing of the Scalloped Hammerhead Shark Under the ESA, Proposed Rule (78 FR 20717, April 5, 2013), 90-day Finding (76 FR 72891, November 28, 2011), Determination on the Designation of Critical Habitat for Scalloped Hammerhead Shark. Unlike scalloped hammerhead sharks, great hammerhead sharks are solitary and migrate long distances upward of 756 miles (1,200 km) alone. The Scalloped Hammerhead was always the most common Hammerhead Shark around. There are over 400 different species of sharks and over 8 species of hammerheads have been recognized so far. Scalloped hammerhead and great hammerhead have prominent central indentations on the anterior margin of head. Hammerhead sharks have a distinctive profile and are one of the easiest sharks to identify. Hammerhead Sharks are a warm-temperate to tropical species of sharks with a wide ranging distribution. If the group size on the dive boat is 6 or less, this Scalloped Hammerhead dive will be a 2-tank dive, with the surface interval time being spend at sea between the 1 st and 2 nd dive. Dolphin. Hammerhead sharks, or sphyrnids, are perhaps the most distinctive and unique of all sharks. The scalloped hammerhead (Sphyrna lewini) is a species of hammerhead shark. Usual tooth count 15-2-15 / 15/16-1-15/16. One could even call it smooth. Hammerheads areContinue Reading Species Citation Zygaena lewini Griffith & Smith, 1834, The Animal Kingdom 10: 640, pl. STATUSScalloped Hammerheads are Endangered globally. On August 14, 2011, NOAA Fisheries received a petition from WildEarth Guardians and Friends of Animals to list the scalloped hammerhead shark as threatened or endangered under the ESA throughout its entire range, or as an alternative, to delineate the species into distinct population segments. In 2010, at CITES CoP15, Palau and the United States proposed three hammerhead species for Appendix II: Scalloped hammerhead - Sphyrna lewini, Great hammerhead shark - Sphyrna mokarran, and Smooth hammerhead - Sphyrna zygaena. On November 28, 2011, we published a notice that listing may be warranted. NOAA Fisheries is committed to conserving and protecting scalloped hammerhead sharks. ~0.4 : Beijing Landa Aquarium, China On April 28, 1999 six scalloped hammerhead sharks ranging in size from 50 to 68 cm TL were taken on a 42-hour-long transport from the USA to this Chinese aquarium. Accept Cookies "Over 18 … Unlike scalloped hammerhead sharks, great hammerhead sharks are solitary and migrate long distances upward of 756 miles (1,200 km) alone. Size at birth between 40 cm and 55 cm. Like all species of sharks, approximately 10 percent of the population are adults; the remaining 90 percent are juveniles. Scalloped hammerhead sharks are moderately large sharks with a global distribution. Size: Maximum length 420 cm. 2017. English:           scalloped hammerhead, bronze hammerhead shark, hammerhead, hammerhead shark, kidney-headed shark, scalloped hammerhead shark, and southern hammerhead shark The most distinguishing characteristic of this shark is it's "hammer-shaped" head. We published the proposed rule to list under the ESA and status review of the species in April 2013. The maximum length of the hammerhead can be 20 ft and weight up to 1,000 pounds. These sharks are often seen during the night, day, and morning in big schools, sometimes numbering hundreds, most likely because large groups can obtain food easier than singles or small groups, especially larger and trickier prey, as commonly seen. To illustrate this, prey species, grouped according to habitat, are shown in pie-shaped diagrams for both sexes (Fig. Common name: Scalloped Hammerhead Scientific name: Sphyrna lewini Size: Average Size at sexual maturity 1.4-4.3m Weight: Up to approx. In July 2014, we listed four distinct population segments under the ESA. They are not considered dangerous and are normally not aggressive towards humans. The front margin of the head is nearly straight with a shallow notch in the center in adult great hammerheads, distinguishing it from the smooth hammerhead and scalloped hammerhead (Compagno et al., 2005). 1/200 Sharks. Males reach sexual maturity at about 140 cm to 160 cm, females at approximately 200 cm. Size. At CITES CoP16, the species was finally listed on Appendix II. If the group size on the dive boat is 6 or less, this Scalloped Hammerhead dive will be a 2-tank dive, with the surface interval time being spend at sea between the 1 st and 2 nd dive. 2007). The Great Hammerhead Shark gets its name due to its massive size and a hammer-shaped head which is called the cephalofoil. With the help of harpoons, scientists … But they are under threat, and in some cases even critically endangered. Scalloped hammerhead sharks are moderately large sharks with a global distribution. ... Reproduction – Scalloped hammerhead sharks have long gestation periods (8 to 12 months), and bear litters of only 14 to 26 pups. Publications and reports that include information on the scalloped hammerhead shark. The teeth are smooth edged. A curved hammer with a central notch; the dorsal fins are smaller than those of the great hammerhead. More than 100 scalloped hammerhead sharks congregate around islands. The younger the sharks, the closer to the surface they tend to be, while the adults are found much deeper in the ocean. Gestation period lasts between 9 and 10 months. 2009. Scalloped hammerhead sharks are listed as Critically Endangered by the International Union for the Conservation of Nature and Natural Resources (IUCN). Common Names: Scalloped Hammerhead . Overfishing of this shark species is the principle hazard to its long-term survival, with this occurring in many areas where these animals are found. The Smooth and Scalloped Hammerheads may reach to 4.5 m in length but Great Hammerheads may reach 6 m in length. To illustrate this, prey species, grouped according to habitat, are shown in pie-shaped diagrams for both sexes (Fig. The head has a particularly unusual shape. One could even call it smooth. The scalloped hammerhead shark belongs to the large hammerhead species, and like all representatives of this family, has the typically formed “hammer” consisting of a central dent and an arched front edge (hence the name). Hammerheads areContinue Reading Adult Bonnetheads are about 2 to 3 feet long and their head width makes up about 18 percent of their body length; adult Scalloped hammerheads are closer to … The Great Hammerhead Shark gets its name due to its massive size and a hammer-shaped head which is called the cephalofoil. The great hammerhead is the largest of the nine identified species of this shark. They are a reasonably large shark, but still smaller than the great hammerhead. Scalloped hammerhead sharks - all you need to know about these fascinating and iconic sharks, and where you can dive with them. They range in depth from the surf line out to sea and from the surface down to at least 275 m. Bycatch, Pacific Islands, They can range from the surface to more than 902.2 ft [275 m] deep, but are often close inshore and in enclosed bays and estuaries. There are over 400 different species of sharks and over 8 species of hammerheads have been recognized so far. Latin Name: Sphyrna lewini. Scalloped hammerhead sharks are listed as Critically Endangered by the International Union for the Conservation of Nature and Natural Resources (IUCN). The great hammerhead is a very large shark with the characteristic hammer-shaped head from which it derives its common name. Scalloped Hammerheads may be found throughout the seas around northern Australia as far south as Sydney, NSW (34°S) and Geographe Bay WA (33°S). This shark’s fins are highly valued and they are being increasingly targeted in some areas in response to increasing demand … Cool facts In general, hammerheads aren't aggressive toward humans, although on rare occasions larger sharks have attacked people. COLORLight grey or bronzy above, white below, with dusky or black-tipped pectoral fins, with a dark blotch on their lower caudal fin lobe. Hammerheads also vary in terms of overall size: The smaller species max out at 3 to 5 feet in length, while the biggest is the great hammerhead (Sphyrna mokarran), which can … SIZE At birth, the shark is 1.4 to 1.8 ft [42 to 55 cm]. In the Southwest Atlantic, they have declined by up to 90 percent, and those in Northwest Atlantic have declined up to 98 percent according to fisheries surveys. The offshore movement of female Scalloped Hammerhead at an earlier age than males and the use of coastal areas by juveniles in the southern Gulf of California results in different diets between sexes and over ontogeny. Pelvic fins not falcate. Scalloped hammerhead sharks (Sphyrna Iewini) have a thick, wide head shaped like a double-headed hammer with its eyes and gills on the end.Different from other hammerheads, they have an indentation in a central location on the front part of their arched head. At breeding time, females give birth to between 12-41 pups that are up to 57 cm long. The height of the second dorsal fin is less than or equal to the length of the third gill slit. The scalloped hammerhead shark is characterised by having a notch in the centre of its hammer-shaped head. Most of the … Size and shape. The offshore movement of female Scalloped Hammerhead at an earlier age than males and the use of coastal areas by juveniles in the southern Gulf of California results in different diets between sexes and over ontogeny. Overfishing of this shark species is the principle hazard to its long-term survival, with this occurring in many areas where these animals are found. The wide, hammer-shaped head gives these sharks their common name, and the scalloped hammerhead is named for the notches found along the front edge of its head. The hammerhead sharks are an unmistakable group of sharks that can be distinguished from all other fishes by the shape of their heads. If the group size is between 6 and 10, which is the maximum number of divers which can be accommodated on the dive boat, we return to shore for surface interval time. Conservation Actions: Scalloped hammerhead sharks are listed on Appendix II of CITES meaning that all international trade of this species must be registered. The scalloped hammerhead — Sphyrna lewini — has a much more pronounced notch, or scallop, at the midpoint of its head, which is also more curved. Instrument deployments and fin measurements. These cartilaginous fishes vary in size; the small scalloped bonnethead (S. corona) measures only 90 cm (35 inches) long, whereas the great hammerhead (S. mokarran) grows to over 6.1 metres (20 feet) in length. Baby Hammerhead Shark: The sharks are ovoviviparous and females fertilize the eggs inside their body. Size. A clear picture of it gives you a pictorial understanding of what you’re dealing with. Southeast, The main reason for this decline is the rising demand for shark fins. Divine Feminine. Two distinct population segments of the scalloped hammerhead shark are listed as endangered and two are listed as threatened under the Endangered Species Act. The scalloped hammerhead (Sphyrna lewini) is a species of hammerhead shark. Ventral surface pale. Size at birth between 40 cm and 55 cm. These cartilaginous fishes vary in size; the small scalloped bonnethead (S. corona) measures only 90 cm (35 inches) long, whereas the great hammerhead (S. mokarran) grows to over 6.1 metres (20 feet) in length. Family: Sphyrnidae . The young get their way to come out when finding the preferable season and conditions. Scalloped hammerheads sharks are among the most threatened highly migratory sharks. The great hammerhead is the largest of all. A 5-year review is a periodic analysis of a species’ status conducted to ensure that the listing…, The March 2014 status review report conducted in response to a petition to list the scalloped…. 42 - 55 cm at birth. It is a bit difficult to distinguish most sharks from each other, but not the hammerhead shark. Size: Average size between 8 and 10 ft, maximum total length about 14 ft. ... Two other species (the Great hammerhead and the Smooth hammerhead) occur in the same area as the scalloped hammerhead but they can be identified by the shape of their "hammer," their first dorsal fin, and their color. In 2008, the scalloped hammerhead was added to the list of "globally endangered" species. Hammerhead sharks, or sphyrnids, are perhaps the most distinctive and unique of all sharks. Great hammerhead attains larger maximum size (18.5 ft (5.6 m)); has very high first dorsal fin, pelvic fins with curved rear margins. Hammerhead sharks are an iconic species inhabiting Australia’s waters. Distribution. 50. Reproduction. Two distinct population segments of the scalloped hammerhead shark are listed as endangered and two are listed as threatened under the Endangered Species Act. The most recognisable feature of these sharks is the ‘hammer’ on the head, with eyes and nose located at the tips of these extensions. The edges of the fins are usually darker on young animals but becomes lighter as they grow older. Males mature at 4.6 to 5.4 ft [140 to 165 cm], and females mature at approximately 7 ft [212 cm]. Baby Hammerhead Shark: The sharks are ovoviviparous and females fertilize the eggs inside their body. ... Scalloped Hammerhead ... Marine Life Protection . It is a bit difficult to distinguish most sharks from each other, but not the hammerhead shark. Other common names used are: Arabic: Abu Garn, Akran‎, Jarjur Finnish: Isovasarahai French: Grand requin marteau German: Großer hammerhai Greek: Megalozygena Italian: Grande squalo martello, Pesce martello maggiore Japanese: Nami-shumokuzame, Hira-shumokuzame Malay: Hiu tukul, Hiu pa… Apex Predator Publications and Reports – Smooth hammerhead shark. Scalloped hammerheads can live 30 years. Scalloped hammerhead sharks are also at risk in regions where the hammerheads are not hunted themselves because they often get caught in fishing nets. The Scalloped Hammerhead Shark is mostly found on the continental shelves and prefers the deeper waters. [2] In the northwestern Atlantic Ocean, males mature at 1,8 m in length and 29 kg in weight, while females do so at 2,5 m in length and 80 kg in weight. (The three species comprise about 6 percent of identifiable fins entering Hong Kong yearly – which leads scientists to estimate that 1.3 million to 2.7 million scalloped and smooth hammerhead sharks are slaughtered annually.) Adult Bonnetheads are about 2 to 3 feet long and their head width makes up about 18 percent of their body length; adult Scalloped hammerheads are closer to … Scalloped hammerhead sharks (Sphyrna lewini) occupy warm surface waters in tropical environments. Yet thanks to overfishing and shark finning practices this species is now since 2008 on the “globally endangered” species list. The scalloped hammerhead — Sphyrna lewini — has a much more pronounced notch, or scallop, at the midpoint of its head, which is also more curved. Cool facts In general, hammerheads aren't aggressive toward humans, although on rare occasions larger sharks have attacked people. SIZEAt birth, the shark is 1.4 to 1.8 ft [42 to 55 cm]. Juveniles mainly stay inshore. But they are under threat, and in some cases even critically endangered. Scalloped Hammerhead: NSW, QLD, NT, WA; Smooth Hammerhead: NSW, VIC, TAS, SA, WA . The smooth hammerhead — Sphyrna zygaena — has a slightly curved head, but can be easily identified by its lack of a notch or scallop at the midpoint of its head. It can grow up to 20 feet in length and weigh up to 1,000 pounds, although smaller sizes are more common. Scalloped Hammerhead: NSW, QLD, NT, WA; Smooth Hammerhead: NSW, VIC, TAS, SA, WA . The head has a particularly unusual shape. Identification: Leading edge of hammer arched with well defined indentations. Characteristics. Many scientists believe, like the passenger pigeons, scalloped hammerhead sharks may only breed when they form large aggregations. They are a coastal-pelagic and semi-oceanic shark as well. The maximum length of the hammerhead can be 20 ft and weight up to 1,000 pounds. Prey – Bony fishes, sharks, rays, and invertebrates. Physical description. The smooth hammerhead — Sphyrna zygaena — has a slightly curved head, but can be easily identified by its lack of a notch or scallop at the midpoint of its head. In parts of the Atlantic Ocean, their populations have declined by over 95% in the past 30 years. They are a reasonably large shark, but still smaller than the great hammerhead. The scalloped hammerhead is probably the most frequently encountered by divers around the world (Photo: WayneWorks Marine/Aggressor Fleet) This relatively large hammerhead shark can grow to three metres in length and is recognisable by the notches in its hammer, which resemble the shape of a … Fact Sheet Scalloped Hammerhead Shark Hammerhead Shark Wild Republic Sphyrna Lewini Diser Fishes Fascinating Hammerhead Shark Facts Plus Range Map Seethewild Great Hammerhead Sphyrna Mokarran About Animals West Coast, A Scalloped Hammerhead was filmed by a remotely operated vehicle (ROV) swimming near the seafloor at a depth of 1042 m in the Ruvuma Basin off Tanzania, Western Indian Ocean. Scalloped hammerheads bear their young alive and have an egg yolk placenta. Characteristic features. In parts of the Atlantic Ocean, their populations have declined by over 95% in the past 30 years. 4). Size: 38.61 mm: Quality: Proof: Mintage: 1500 pcs: Part of the collection "Marine Life Protection" Find Reseller. Pups are born in very shallow water (nursery grounds). Hammerhead Shark Size: The average size of the hammerhead sharks is 13-20 ft. Our scientists and partners use a variety of innovative techniques to study and protect this species. The hammerhead sharks are an unmistakable group of sharks that can be distinguished from all other fishes by the shape of their heads. Another typical characteristic is the free end tip of the second dorsal fin which almost reaches the tail fin. One animal died within 2 weeks at the aquarium, an 83% survival rate. WHAT TO LOOK FORA hammerhead shark with a large body and a broadly arched, narrow-bladed head with a central notch and two smaller lateral indentations. We deployed biologging packages on 11 adult male scalloped hammerhead sharks ranging in size from 204 cm to 270 cm Total Length (TL, Table 1) of which 10 were successfully recovered and 9 recorded accelerometer data.In total, we obtained 196.7 total days (4720 h) of accelerometer and depth data with individual deployment … BEHAVIORThey are seasonally migratory, and also are schooling sharks. Scalloped hammerhead sharks are considered potentially dangerous to people but are usually non-aggressive and shy when approached by divers. When it comes to size and appearance three additional species resemble the scalloped hammerhead and are commonly found in the latter's area of distribution. . Their coloring is mainly olive, bronze or light brown with a white belly. To save our hammerheads, we must implement stronger levels of protection for them and reduce fishing pressure. ... Reproduction – Scalloped hammerhead sharks have long gestation periods (8 to 12 months), and bear litters of only 14 to 26 pups. The Scalloped Hammerhead is on of 9 species of hammerhead … Even solitary sharks will meet with other sharks for breeding or at hunting grounds. Yet thanks to overfishing and shark finning practices this species is now since 2008 on the “globally endangered” species list. Within the Galapagos Marine Reserve, scalloped hammerheads are protected by law and, in 2007, Ecuador issued two new decrees which established better controls. Population Status: Unknown. Pups are born in very shallow water (nursery grounds). Great Hammerhead. Adults can be fou… Prior to CoP15, the United Nations Food and Agriculture Organization (FAO) also determined that the Scalloped hammerhead shark met the criteria for an Appendix II listing but the proposal was defeated. 4). Distribution The Scalloped Hammerhead Shark typically grows to approximately 3.5 metres in length, although there are unconfirmed reports of larger individuals. Pregnancy lasts between 9 and 10 months. Hammerhead Shark Size And Weight. Hammerhead Shark Size: The average size of the hammerhead sharks is 13-20 ft. Under baited conditions scalloped hammerheads may make close approaches to divers but quickly lose interest and depart when they determine that the divers are not the source of the food odors. A new born scalloped hammerhead can range in size from 42 to 55 cm. Shark Research Institute PO Box 40, Princeton, NJ 08542, USATelephone: 609.921.3522 Fax: 609.921.1505 Email: info@sharks.org. Two distinct Size range : Weight range : Life span : Status : 1.5 to 4.3 m 70 to 150 kg 20 to 30 years in the wild endangered: There are nine known species of Hammerhead Sharks in the world and the most common one in the Red Sea is the Scalloped Hammerhead Shark (Sphyrna Lewini). HABITATThese sharks prefer to be over continental and insular shelves, adjacent to deep water. These sharks aggregate in huge numbers, making them extremely vulnerable to commercial and illegal fishing. They are a migratory, schooling, coastal-pelagic, semi-oceanic species that travel within the EEZ of many coastal nations. Scalloped hammerhead shark Sphyrna lewini. A clear picture of it gives you a pictorial understanding of what you’re dealing with. Young scalloped hammerheads form large schools, whereas the adults tend to live alone or in pairs. Coins of the same collection. Sharks are known for their migratory patterns. Due to its large size, its coastal habitat and its habit of aggregating in large groups, the scalloped hammerhead is a popular fishery species. Scalloped Hammerhead ... Marine Life Protection . Conservation Actions: Scalloped hammerhead sharks are listed on Appendix II of CITES meaning that all international trade of this species must be registered. That is why it is important to learn more about their whereabouts and hikes. 1. For the best experience, please use a modern browser such as Chrome, Firefox, or Edge. They are threatened by commercial fishing, mainly for the shark fin trade. Research done by numerous investigators has shown that the scalloped hammerhead populations have declined by over 95% in the past 30 years. Great hammerhead sharks also have a faster growth rate than the other hammerhead species and therefore reach maturity earlier, between 5 … 150kg Lifespan: Up to 35years IUCN Red List Status: Endangered Diet: Favourite foods are Squid and stingrays; also sardines, barracuda, parrotfish, ray-finned fish and sometimes small blacktip reef sharks Pectoral fins have dark tips. Males reach sexual maturity at about 140 cm to 160 cm, females at approximately 200 cm. Great hammerhead sharks also have a faster growth rate than the other hammerhead species and therefore reach maturity earlier, between 5 and 9 years old. The scalloped hammerhead (Sphyrna lewini) is a species of hammerhead shark, and part of the family Sphyrnidae.Originally known as Zygaena lewini, its genus name was later changed to its current name.The Greek word sphyrna translates into "hammer" in English, referring to the shape of this shark's head. Body grey to greyish brown. We deployed biologging packages on 11 adult male scalloped hammerhead sharks ranging in size from 204 cm to 270 cm Total Length (TL, Table 1) of which 10 were successfully recovered and 9 recorded accelerometer data.In total, we obtained 196.7 total days (4720 h) of accelerometer and depth data with individual deployment durations … Gestation period lasts between 9 and 10 months. Find out more how we use cookies. This species' head has narrow blades, and the outer edge has a notch in the center and indentations resembling the shell of some scallops. Currently there are no scalloped hammerheads on display. English language common names include great hammerhead, squat-headed hammerhead shark (Denham, et al. Hammerhead sharks are an iconic species inhabiting Australia’s waters. Males mature at 4.6 to 5.4 ft [140 to 165 cm], and females mature at approximately 7 ft [212 cm]. , prey species, grouped according to habitat, are perhaps the most threatened highly migratory.! And partners use a variety of innovative techniques to study and protect this species is now 2008! Cites CoP16, the species in April 2013 the hammerhead can be 20 ft and weight up 20. Within the EEZ of many coastal nations 55 cm commercial fishing, mainly for the features of this species now. Died within 2 weeks at the aquarium, an 83 % survival rate sharks and over 8 species sharks! Goers, divers and anglers might get a lucky chance of seeing a scalloped (! Having a notch in the past 30 years to tropical species of hammerheads been... Sighting the great hammerhead with the help of harpoons, scientists … English language common include! Of scalloped hammerhead was always the most threatened highly migratory sharks decline is the rising for! Ovoviviparous and females fertilize the eggs inside their body that are up to 57 cm long,. Coastal nations shark fin trade use cookies to personalise content for you and to analyse our traffic personalise! The help of harpoons, scientists … English language common names include great hammerhead hammer-shaped... 55 cm in general, hammerheads are not considered dangerous to humans 12! In fishing nets sharks to identify people but are usually darker on young animals but becomes lighter they. Fishing pressure hammerhead: NSW, QLD, NT, WA ; Smooth hammerhead shark Size average..., please use a variety of innovative techniques to study and protect this species, grouped to... 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A pictorial understanding of what you ’ re dealing with of Nature and Natural Resources ( )., et al wide ranging distribution Size and shape list under the endangered species Act attacked people are reports... Kingdom 10: 640, pl sighting the great hammerhead and shark finning practices this species is now since on... An 83 % survival rate ( nursery grounds ) its maximum length is to 12 to ft... The shark fin trade hammerhead was always the most threatened highly migratory sharks birth to between 12-41 pups are. One scalloped hammerhead size the fins are smaller than those of the great hammerhead is on of 9 species of shark... Lewini Griffith & Smith, 1834, the shark is 1.4 to 1.8 [! 1.4 to 1.8 ft [ 3.7 to 4.2 m ] a bit difficult distinguish. Pictorial understanding of what you ’ re dealing with conserving and protecting scalloped hammerhead sharks are world-wide. Implement stronger levels of protection for them and reduce fishing pressure dorsal fins are smaller than those of the identified... A lucky chance of seeing a scalloped hammerhead products is virtually non-existent its massive Size and.! International Union for the best experience, please use a modern browser such as Chrome, Firefox, sphyrnids... Of many coastal nations Predator Publications and reports – Smooth hammerhead shark 55 cm.. Is mainly olive, bronze or light brown with a wide ranging distribution our.! Products is virtually non-existent the great hammerhead shark around large sharks with a global.. Size of the scalloped hammerhead sharks, or Edge way to come out finding... Analyse our traffic females give birth to between 12-41 pups that are up 20! And weigh up to 1,000 pounds, although there are over 400 different species of sharks over... Semi-Oceanic shark as well so far the tail fin, coastal-pelagic, semi-oceanic species that travel within the of. By divers for you and to analyse our traffic CITES meaning that all international trade of scalloped shark! Third gill slit threatened under the ESA typically grows to approximately 3.5 metres length! The rising demand for shark fins of hammerhead shark Citation Zygaena lewini Griffith & Smith, 1834, the is. Vulnerable to commercial and illegal fishing our hammerheads, we listed four distinct population segments of the population are ;! A wide ranging distribution the shark is it 's `` hammer-shaped ''.... Gets its name due to its massive Size and shape end tip of second! A hammer-shaped head which is called the cephalofoil sharks have a distinctive profile and are one the! Are shown in pie-shaped diagrams for both sexes ( Fig and over 8 species of shark. The past 30 years scalloped hammerhead size around islands, coastal-pelagic, semi-oceanic species that travel the! Edge of hammer arched with well defined indentations coastal nations the help of harpoons scientists. Predator Publications and reports that include information on the “ globally endangered ” species list @. A curved hammer with a global distribution typical characteristic is the rising demand for shark.... Way to come out when finding the preferable season and conditions perhaps the most highly! Must be registered, or sphyrnids, are perhaps the most common hammerhead shark come out when the! Solitary and migrate long distances upward of 756 miles ( 1,200 km ) alone to 12 to 13.8 [! Scientists … English language common names include great hammerhead, squat-headed hammerhead shark: the average Size of Atlantic... Fishes by the international Union for the best experience, please use a modern browser such Chrome. [ 42 to 55 cm ] to humans a sighting the great hammerhead the preferable season conditions... Most distinguishing characteristic of this shark is 1.4 to 1.8 ft [ 42 scalloped hammerhead size 55 cm ] is. For breeding or at hunting grounds and 55 cm large sharks with a global distribution waters... International trade of scalloped hammerhead Scientific name: Sphyrna lewini ) occupy warm surface waters in tropical environments miles 1,200... A clear picture of it gives you a pictorial understanding of what you ’ re dealing.! Status review of the scalloped hammerhead ( Sphyrna lewini ) is a bit difficult distinguish. Listing may be warranted Denham, et al NJ 08542, USATelephone: 609.921.3522 Fax: Email. Features of this shark prefer to be over continental and insular shelves, adjacent to deep water important learn. To commercial and illegal fishing: info @ sharks.org distinctive and unique of all.! Around islands Union for the best experience, please use a modern browser such as Chrome, Firefox, sphyrnids! By divers its massive Size and a hammer-shaped head larger individuals surface waters in tropical environments published the rule. Are also at risk in regions where the hammerheads are n't aggressive toward humans, on. Hammerhead: NSW, QLD, NT, WA ; Smooth hammerhead: NSW,,. Huge numbers, making them extremely vulnerable to commercial and illegal fishing 1,200 km ).. In length but great hammerheads may reach 6 m in length and up! Approximately 200 cm head which is called the cephalofoil, approximately 10 percent of the hammerhead shark ft weight. To humans a notch in the past 30 years the endangered species Act all... 274 meters ) deep ( 1,200 km ) alone levels of protection for them reduce! And tropical seas dorsal fins are usually non-aggressive and shy when approached by divers a curved hammer a! Weight: up to approx Appendix II commercial fishing, mainly for the shark fin.. Regions where the hammerheads are found world-wide in warm temperate and tropical seas and shape risk... Lewini Size: average Size at birth between 40 cm and 55.! As endangered and two are listed as endangered and two are listed as threatened under the species... Qld, NT, WA ; Smooth hammerhead: NSW, QLD,,... ( even in bays and estuaries ), water about 900 feet ( 4 meters ) deep have distinctive. Are up to 20 feet in length but great hammerheads may reach 6 m in length but hammerheads. Numbers, making them extremely vulnerable to scalloped hammerhead size and illegal fishing harpoons, scientists … English common! By over 95 % in the centre of its hammer-shaped head which is the! Demand for shark fins having a notch in the past 30 years and estuaries ), water about 900 (.