It has a length of about 18 to 20 feet. The scalloped hammerhead shark (Sphyrna lewini) is listed as globally endangered on the IUCN’s Red List. and Lyle, J.M. Hammerhead sharks, or sphyrnids, are perhaps the most distinctive and unique of all sharks. Scalloped Hammerhead Shark 5-Year Review (2020) Notice, Pacific Islands. The Scalloped Hammerhead sometimes forms large migratory schools, dispersing at night to feed in deeper waters. Hammerheads are usually gray-brown to olive-green on top. Large scalloped hammerhead sharks will eat other small shark species. Scientific Name: Sphyrna lewini Family: Hammerhead Sharks - Sphyrnidae Adult Length: 4 - 6 m (13 - 19 ft) Size: 5 - 9 ft., max. Scalloped Hammerhead; Scoophead; Great Hammerhead; Bonnethead; Smalleye Hammerhead; Smooth Hammerhead; The largest of them all is the Great Hammerhead Shark. Scalloped hammerhead sharks are listed as Critically Endangered by the International Union for the Conservation of Nature and Natural Resources (IUCN). This problem, driven by the high economic value of its fins and the consumption of its meat, has led to the species being overfished during all stages of its lifecycle. They are most commonly found in the ‘Hammerhead Triangle’ between Cocos, Galapagos and Malpelo as well as the Red Sea. The biology of three hammerhead sharks (Eusphyrna blochii, Sphyrna mokarran and S. lewini) from Northern Australia. SCALLOPED HAMMERHEAD SHARK, Sphyrna lewini, Sphyrnidae, Red Sea, Egypt. 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). The Explorers Club went live on Facebook to do a deep dive on the importance of sharks in our ecosystem. In general, hammerheads aren't aggressive toward humans, although on rare occasions larger sharks have attacked people. Characteristic features. This shark's unusual name comes from the unusual shape of its head, an amazing piece of anatomy built to maximize the fish's ability to find its favorite meal: stingrays. Their bellies are white which allows them to blend into the ocean when viewed from the bottom and sneak up on their prey. Out of nine species, two are listed as endangered (great hammerhead and scalloped hammerhead) and one as vulnerable (golden hammerhead) species. 05/14/2020. Hammerhead sharks can be found both in deep and shallow waters. Endangered Species Act and has life history characteristics that make this species particularly at risk for local depletion. Photo by: Gerard Soury Gerard Soury. The scalloped hammerhead (Sphyrna lewini) is a species of hammerhead shark. The largest species is the Great hammerhead. Like all sharks, they have a cartilaginous skeleton and rough skin, and a streamlined body shape. It is a rare, little-known species of hammerhead shark. Scalloped hammerheads usually grow to the length of 1.5 to 2.7 meters long, but the longest found was 4.3 meters long. A curved hammer with a central notch; the dorsal fins are smaller than those of the great hammerhead. Hammerhead Shark Facts for Kids. They are a reasonably large shark, but still smaller than the great hammerhead. The great hammerhead is the largest of the nine identified species of this shark. 14ft (1.5 - 2.7m., max 4.2m) Depth: 10 - 600 ft (3 - 182m) Scalloped Hammerhead Sharks are the most common species of hammerheads in costal regions, even appearing in shallow waters like estuaries and inlets. Conservation and management efforts of marine apex predators are more reliable when information on movement and habitat use patterns are known. The Ecology of the Scalloped Hammerhead Shark, Sphyrna lewini J in Hawaiil THOMAS A. CLARKE2 ABSTRACT: Kaneohe Bay, Oahu, is a pupping ground for the scalloped hammer­ head shark, Sphyrna lewini, the pups being most abundant between April and October. Although they primarily inhabit open marine waters, scalloped hammerheads can also be found near continental and island shelves and often enter bays and estuaries as well. Foreign. Today is Shark Awareness Day! Sharks are Nearly Extinct in the World's Reefs . Next Up. Like all hammerhead sharks, the scalloped hammerhead has a hammer shaped head with a central dent and an arched front edge. During summer, few individuals are seen to migrate toward the poles like the South China Sea and off Florida. Scalloped Hammerhead Shark Sphyrna lewini. Usual tooth count 15-2-15 / 15/16-1-15/16 . Stevens, J.D. Hammerhead sharks Temporal range: Paleocene to present PreꞒ Ꞓ O S D C P T J K Pg N Scalloped hammerhead Scientific classification Kingdom: Animalia Phylum: Chordata Class: Chondrichthyes Order: Carcharhiniformes Family: Sphyrnidae T. N. Gill, 1872 Genera Eusphyra Sphyrna The hammer-like shape of the head means that hammerhead sharks can sweep for prey more effectively. Hammerhead Shark Lifespan: These sharks have a lifespan of 20 to 30 years. Scalloped Hammerheads are the most common hammerhead and can be found in warm temperate to tropical oceans, from coastal areas to islands and seamounts far offshore. Hammerhead shark, (family Sphyrnidae), any of 10 shark species belonging to the genera Sphyrna (9 species) and Eusphyrna (1 species), which are characterized by a flattened hammer- or shovel-shaped head, or cephalofoil. Scalloped hammerhead use the sensors in their… https://oceana.org/marine-life/sharks-rays/scalloped-hammerhead-shark Most other species only grow to 4 meters (13ft). James T. Ketchum, Alex Hearn, A. Peter Klimley, Eduardo Espinoza, César Peñaherrera, John L. Largier, Seasonal changes in movements and habitat preferences of the scalloped hammerhead shark (Sphyrna lewini) while refuging near an oceanic island, Marine Biology, 10.1007/s00227-013-2375-5, 161, 4, (755-767), (2014). These sharks are also known for staying in groups or schools during the day and hunting alone at night. Sharks can detect weak electrical fields using electrical sense organs called the ampullae of Lorenzini. Let’s get on with many more hammerhead shark facts and information. Like all other hammerhead sharks, the scalloped hammerhead has a "hammer", which is known as the "cephalofoil", on its head.The shark's eyes and nostrils are placed on the ends of the cephalofoil. Scalloped hammerhead sharks get their name from the deep indentation in the centre of their hammer-like head. They are known to form large migratory schools and in Australia tend to move south during the warmer months. Today I want to write about an amazing shark with a very strange head, the scalloped hammerhead. The tips of the hammer each bear an eye and a nostril, and are several feet apart. Learn more about these interesting creatures below. West Coast. ("Scalloped Hammerhead Sharks, Sphyrna lewini", 1998; Carpenter, 2011) Scalloped hammerheads utilize different habitats daily. Determination on the Designation of Critical Habitat for Scalloped Hammerhead Shark. (It's possible that these sharks are a separate species, the great hammerhead, Sphyrna mokarran.) The “Hammer” Head – The uniquely shaped head that all hammerhead sharks share is called a cephalofoil. The most recognisable feature of these sharks is the ‘hammer’ on the head, with eyes and nose located at the tips of these extensions. That is why it is important to learn more about their whereabouts and hikes. The second species aided by WAWA’s campaign is the scalloped hammerhead shark, a beautiful mystery of the deep whose weird appearance is matched by its unique social behaviour which has unfortunately contributed to their own downfall as large groups are caught in fishing nets when they gather. Distribution. Australian Journal of Marine and Freshwater Research 40: 129–146. Description. Scalloped Hammerhead. There are a two proposed uses/advantages to this oddly shaped head. They are threatened by commercial fishing, mainly for the shark fin trade. Hammerhead Shark Habitat. The lifespan for most Hammerheads is between 25 and 35 years. Sphyrna is the Greek word for hammer, which is how the scientific name was derived. Interesting Facts About the Hammerhead Shark. There are nine different species of hammerhead shark, and each has its own unique traits and adaptations. Females grow larger than males. Two distinct population segments of the scalloped hammerhead shark are listed as endangered and two are listed as threatened under the Endangered … Another typical characteristic is the free end tip of the second dorsal fin which almost reaches the tail fin. Their colouring is mainly brownish grey, olive or bronze above, with a white belly. The funds raised by WAWA will be donated to Galapagos Conservation Trust’s Endangered Sharks … The scalloped bonnethead (Sphyrna corona) is the smallest species of hammerhead shark, measures up to 92 centimeters (36 inches) long. Hammerhead sharks prefer swimming in the continental shelf and seashores of tropical waters around the world. Tanaka, … With the help of harpoons, scientists want to equip the sharks with transmitters. The Scalloped Hammerhead Shark is a coastal pelagic species with a circumglobal distribution in warm temperate and tropical coastal areas between 45°N and 34°S. 1989. Scalloped hammerhead sharks, Sphyrna lewini (Griffith and Smith, 1834), are large hammerhead sharks with moderately high first dorsal fins and low second dorsal and pelvic fins. Hammerhead shark is probably the weirdest type of sharks. It’s likely that over … 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. Marine and Freshwater Research 58: 34-40. The height of the second dorsal fin is less than or equal to the length of the third gill slit. There are nine species of hammerhead sharks that inhabit all oceans of the world. The most distinguishing characteristic of this shark is it's "hammer-shaped" head. Scalloped hammerhead sharks are moderately large sharks with a global distribution. 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