The most distinguishing characteristic of this shark… 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). Scalloped Hammerhead shark (Sphyrna lewini) is an endangered species which its populations have been declining globally including in Indonesia, the world’s top shark fishing country. The scalloped hammerhead — Sphyrna lewini — has a much more pronounced notch, or scallop, at the midpoint of its head, which is also more curved. Distribution Scalloped hammerhead sharks (Sphyrna lewini) ... the sheer physical size of the shark insulates the body core and provides a short window of opportunity for them to exploit deep, ... Scalloped hammerhead shark at the Hawaii Institute of Marine Biology Shark Lab. Sphyrna comes from the Greek and translates into hammer. Hammerheads areContinue Reading … Family Sphyrnidae - sharks. These social gatherings have been found in Malpelo (Columbia), Sea of Cortez, Costa Rica (near Cocos Island), the Galapagos Island, Columbia, the Malpelo, the Red Sea, Bahamas (San Salvador, Hawaii, South Africa, China Sea, Australia and the Philippines (Cabilao Island). The Scalloped Hammerhead Shark typically grows to approximately 3.5 metres in length, although there are unconfirmed reports of … (It's possible that these sharks are a separate species, the great hammerhead, Sphyrna mokarran.) Scalloped hammerheads are estimated to have lost up to ~80% of their original population in QLD waters (2). ... State size/bag limits. Weight. [18] Nursery grounds for this species are predictable and repeated over the years, and they are faithful to their natal sites. Well, this. Beach goers, divers and anglers might get a lucky chance of seeing a scalloped hammerhead swimming close to shore. Usual tooth count 15-2-15 / 15/16-1-15/16. Originally known as Zygaena lewini, its genus name was later changed to its current name. The name, obviously, comes from the shape of the Shark’s head. Other names: Kidney headed shark; Scientific name: Sphyrna lewini; Size Range: Common length — 45–350cm; Size limits on takes: No take; Possession limits on takes: No take; Description: large, moderately slender shark; broadly arched hammer, with central and deeper side indentations; They are threatened by commercial fishing, mainly for the shark fin trade. It seems like other shark species do not display the same difficulty in avoiding acrylic panels. What happens when you set a remote camera at the world's best dive site? [18] This species does not seem to attack each other even in periods of starvation. Males are usually smaller (4-6 feet) and females are usually larger (6-8 feet). Like most sharks, parental care is not seen. Hammerheads are among the most commonly caught sharks for finning. Researchers attribute this growth in demand to the increase in shark fins as an expensive delicacy (such as in shark fin soup) and are calling for a ban on shark finning, a practice in which the shark's fins are cut off and the rest of the animal is thrown back in the water to die. The Scalloped Hammerhead Shark can be distinguished by their large flattened 'hammer-like' head, with wide set eyes … Hammerhead sharks are most common near Wolf Island and Darwin Islands in the north of the archipelago.Galapagos is one of the last remaining places where large schools of scalloped hammerhead sharks can be observed. Photo credit: Mark Royer. Find premium, high-resolution stock photography at Getty Images. A related species that demonstrates similar feeding behaviour to the Smooth Hammerhead Shark is the coastal and semi-oceanic pelagic Scalloped Hammerhead Shark. It has also been named Cestracion leeuwenii by Day in 1865, Zygaena erythraea by Klunzinger in 1871, Cestracion oceanica by Garman in 1913, and Sphyrna diplana by Springer in 1941. The younger the sharks, the closer to the surface they tend to be, while the adults are found much deeper in the ocean. Scalloped Hammerhead Shark Although schooling has been reported in many shark species, none can match the social complexity of the Scalloped Hammerhead ( Sphyrna lewini ). The teeth are smooth edged. One shark was found with 96 venomous stingray barbs imbedded in its mouth and jaws. Juveniles normally hang out in bigger groups. The hunting can be an individual effort or done in groups, depending on the geography and the size of prey. Minimum size 99 in. [2], It is a sister species to Sphyrna gilberti, differing by the number of vertebrae. Recent estimates suggest there has globally been a 50-90% decrease in Scalloped Hammerhead and total hammerhead shark abundance over the past 32 years in South Africa, the central Atlantic and Brazil. The shape of its head allows it to bury into the seafloor and pin stingrays down. Scalloped Hammerhead. The Scalloped Hammerhead Shark typically grows to approximately 3.5 metres in length, although there are unconfirmed reports of larger individuals. The scalloped hammerhead is the most frequently maintained large species, and it has been kept long term at public aquaria in most continents, but primarily in North America, Europe, and Asia. Mature females can reach a length of more than 4 meters, the average length is, however, less. 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). As of 2008, the scalloped hammerhead is on the "globally endangered" species list. The Scalloped Hammerhead was always the most common Hammerhead Shark around. Hammerhead shark species can be as short as 3 feet and as long as 19.7 feet. As a result, only the fittest grow to maturity. (Photo by Prisma Bildagentur/Universal Images Group via Getty Images) {{textForToggleButton('839212858')}} {{textForToggleButton('839212858')}} ... All limited use licenses come in the largest size available. These sharks have a very high metabolic rate, governing behavior in acquiring food. Hammerhead sharks are carnivores. These large migrating groups include males, females, adults, juveniles, and even other shark breeds. (It's possible that these sharks are a separate species, the great hammerhead, Sphyrna mokarran.) View top-quality stock photos of Scalloped Hammerhead Sharksphyrna Lewinifeeding Cocos Is Costa Rica. These sharks are distinguished from other members of the hammerhead family by their scalloped-shape of the front edge of their cephalophoil. 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. English:           scalloped hammerhead, bronze hammerhead shark, hammerhead, hammerhead shark, kidney-headed shark, scalloped hammerhead shark, and southern hammerhead shark The younger the sharks, the closer to the surface they tend to be, while the adults are found much deeper in the ocean. 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 female scalloped hammerheads undergo migration offshore at a smaller size than males[11] because the larger classes of the hammerhead, such as those from 100 to 140 cm long, travel deeper down. Scalloped hammerhead shark handling and tagging procedures were approved by the ethics committee at the University of Hawaii (Institutional Animal Care and Use Committee Protocol #05-053). From Scalloped Hammerhead Shark to Types Of Sharks. When using Klay's formula to estimate the minimum tank size to host sharks, a 3 m scalloped hammerhead shark would require a tank of 36 m long × 15 m wide × 7 m deep (Choromanski, 2004), which is approximately the CRE size except for depth (maximum 4.5 m). [20] "This species tendency to aggregate in large groups making capture in large numbers on long lines, bottom nets and trawls even easier". The head of the shark is expanded laterally, resembling a hammer. 275 m. Not applicable. The scalloped hammerhead is the third largest species of hammerhead. A large part of the group is formed by females that are around 1.7 meters in size. They also make use of earths magnetic field. iStock Scalloped Hammerhead Shark Stock Photo - Download Image Now Download this Scalloped Hammerhead Shark photo now. [14] Although they have high metabolic rates, they have a tendency to be sedentary and allow currents to carry them as they swim. 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 … In parts of the Atlantic Ocean, their populations have declined by over 95% in the past 30 years. These cartilaginous fishes vary in size; the small scalloped bonnethead … The great hammerhead is the largest of the nine identified species of this shark. Fishes PDF updated 4/12/19 . Characteristic features. While the Taiwan scalloped hammerhead seems to have an earlier maturity rate, it is still reported to be slow to mature.[19]. NEW Marine Life Trivia . These sharks occupy tertiary trophic levels. Diet comparison between silky sharks (Carcharhinus falciformis) and scalloped hammerhead sharks (Sphyrna lewini) off the south-west coast of Mexico - Volume 97 Issue 2 - Isaac Antonio Flores-Martínez, Yassir Edén Torres-Rojas, Felipe Galván-Magaña, Julia Ramos-Miranda Instrument deployments and fin measurements. Females give birth to live pups after a pregnancy which lasts about 10 months. [10] Here, female sharks give birth to live young: juveniles remain in the shallow root system of the mangroves for around three years. Author KNH serves as co-editor-in-chief for this journal. The scalloped hammerhead (Sphyrna lewini) is a species of hammerhead shark, and part of the family Sphyrnidae.Originally known as Zygaena lewini, the name of its genus was later renamed to its current name.The Greek word sphyrna translates into "hammer" in English, referring to the shape of this shark's head. //