Researchers noticed that when young . Hammerhead shark. n = 20. There are 9. Only 3 of the 9 Hammerhead species (Great, Scalloped, and Smooth Hammerheads) have ever attacked a human. It is uniform grey, grey brown or olive above with white underside. Taxonomy and Basic Description. These large sharks average about over 500 pounds (230 kg) but can weigh as much as 1,000 pounds (450 kg). Originally known as Zygaena lewini, its genus name was later changed to its current name. They can grow as long as six meters in length. The most distinguishing characteristic of this shark, as in all hammerheads, is the . Alongside other species of hammerhead, scalloped hammerheads are known for their distinctive heads - the feature from which the entire group gets its name. English language common names include great hammerhead, squat-headed hammerhead shark (Denham, et al. Distribution and habitat The scalloped hammerhead is a coastal pelagic species; it occurs over continental and insular shelves and in nearby deeper . === Endless Ocean . Great Hammerhead - The great hammerhead is the largest of all the species. Two of the 28 examined scalloped hammerhead sharks were not infected with nematodes. It lives inshore at depths up to 100 m. It's also known to visit estuaries and mangroves. Scalloped Hammerhead Shark (Sphyrna lewini) 3. Hammerhead sharks are a group of sharks which make up the family Sphyrnidae. Inside the Sphyrnidae family, there are two genera. Scientific Name - Sphyrnidae Sphyrna. cic scalloped hammerhead populations; populations were reciprocally monophyletic.
FAQs About Hammer Sharks If you have any questions about great hammerheads, scalloped hammerheads, and other hammerheads, take a look at the following FAQs. The winghead shark is the only one with its own genus, Eusphyra. Scalloped and Carolina hammerheads are indistinguishable based on external morphology and can only be identified using precaudal vertebrae counts (83-91 Carolina hammerhead, 92-99 scalloped . There are eight species in the genus Sphyrna, and one in the genus Eusphyra . To evaluate the expectations . Hammerhead sharks, caught both in the longline and purse seine fisheries, are among the top shark species caught in the eastern Pacific Ocean. Scalloped hammerhead Sphyrna lewini (Griffith & Smith, 1834) Description: A large Hammerhead with a notch at the center of the head. The vertical movements logged by scalloped hammerheads ranged from the surface to a maximum depth of 283.5 m. The shark remained at a preferred depth range (30-60 m) in both daytime (80%) and night-time (66%). In conclusion, I therefore ranked the functions of the hammerhead cephalofoil (arranged from most to least significant) as: 1) increasing electrosensitive acuity, 2) increasing scent-tracking efficiency, 3) increasing maneuverability, and 4) increasing lift. Most are in the genus Sphyrna, but one hammerhead shark has its own genus called Eusphyra. Location: Pacific - Atlantic . The scalloped hammerhead is a coastal pelagic species; it occurs over continental and insular shelves and in nearby deeper water. Scalloped hammerheads are viviparous. The scalloped hammerhead typically lives in warm, tropical, or temperate waters, and can be found in many locations around the globe between 46N and 36S. Endangered status In 2008, the scalloped hammerhead was placed on the "globally endangered" list. Young ones grow slowly compared to other sharks. The scientific name of the shark is Sphyrna lewini. Rolled swimming and energy conservationA 2016 study of specimens logged with accelerometers showed that great hammerhead sharks reduce drag and lessen energy expenditure by swimming on their side in a posture termed rolled swimming. The front of the head has an undulating margin with a central notch. Global phylogeography of the scalloped hammerhead shark (Sphyrna lewini) Mol Ecol. The largest reported was 20 feet (6 m) long. They can dive up to 1000m but are mostly found near the surface, between 0 and 25 meters. The . . 244, 11230, 58302 ). They have a distinct head, known as a Catch data are limited, but populations are shown to be declining.2 To evaluate the expectations . Larger movements occurred at night for a longer period between the depth ranges of 0-30 m and 60-90 m compared to the day. on the genetic architecture of this species and may indicate a mechanism for recent evolutionary radiations in the genus Sphyrna. Paragaleus is a genus of weasel shark in the family Hemigaleidae. All have a brown-gray color on the back and white on the belly, although the pecs below . Figure 1. The scalloped hammerhead (Sphyrna lewini) can also reach lengths of more than 13 feet (4 meters).This species' head has narrow blades, and the outer edge has a notch in the center and indentations resembling the shell of some scallops.. Scalloped hammerheads are found in inshore (even in bays and estuaries), water about 900 feet (274 meters) deep. Hammerhead Shark Profile. The first dorsal fin is very tall with a pointed tip and . There are eight species in the genus Sphyrna, and one in the genus Eusphyra. The scalloped hammerhead (Sphyrna lewini) can also reach lengths of more than 13 feet (4 meters).This species' head has narrow blades, and the outer edge has a notch in the center and indentations resembling the shell of some scallops.. Scalloped hammerheads are found in inshore (even in bays and estuaries), water about 900 feet (274 meters) deep. The undersides of their pectoral fins have black tips. Of the remaining 26 sharks, nine (34.6%) were infected with a nematode belonging to the genus Pulchrascaris Vicente and dos Santos 1972, herein described as a new species. No human fatalities have been recorded. Of the nine species of the Hammerhead sharks, the Winghead shark is in the genus Eusphyra, and the other eight are in the genus Sphyrna . There are 9 species of hammerhead sharks, ranging in size from about 3 feet (0.9 m) long to over 20 feet (6 m). A large hammerhead shark with broad hammer (width 24-30% of TL), narrow-bladed side extensions on the head; front margin of head broadly convex, and scalloped due to a prominent middle indentation, a more conspicuous notch near the end of each side of the hammer (which sets off the end lobe bearing the eye), and a slight indentation in front margin between the central and side notches on each . . Though we edit our accounts for accuracy, we cannot guarantee all information in those accounts. These deep-sea predators are one of the most recognizable species of shark due to their strange shaped head known as a cephalofoil. Hammerhead sharks, or the Sphyrnidae, are a family of sharks in the order Carcharhiniformes. Unlike scalloped hammerhead sharks, great hammerhead sharks are solitary and migrate long distances upward of 756 miles (1,200 km) alone. The vast majority of the time, these sharks are safe for divers in open waters. The most distinguishing characteristic of this shark is its "hammer-shaped" head. 2006 Jul;15(8):2239-51. doi: 10.1111/j.1365-294X.2006.02933.x. This species resides in both temperate and tropical waters. Their common names include various hammerheads, scoopheads, bonnetheads and a winghead all variations on the common theme. Scalloped hammerhead Family: Sphyrnidae Hammerhead, bonnethead, or scoophead sharks Max.
Biology: The Great Hammerhead is a solitary species, rarely seen with other sharks. The scalloped hammerhead is a species of hammerhead shark, and part of the family Sphyrnidae. Gerard Soury / Getty Images. This tree starts at the phylum classification. The exceptions are associated with sedentary behaviour, disjunct distributions, or reproductive philopatry. They also have darker fins than adults. As you know, the specific hammerhead we are covering is the Sphyrna lewini or in english the scalloped hammerhead shark. The head of the scalloped hammerhead has three distinctive features: the series of four bumps on the front of the head, the stubby width of the hammer (relative to great and smooth hammerheads) and the curvature of the hammer. The scalloped hammerhead shark (Sphyrna lewini) is listed as globally endangered on the IUCN's Red List. length (Lmax): cm TL L infinity (Linf): = cm K: /year ' = Median ' value with related Linf.
The scalloped hammerhead is subject to targeted fisheries, illegal fishing, and fishery bycatch throughout the world. Scalloped hammerhead Sphyrna lewini (Griffith & Smith, 1834) Sphyrna lewini: Sphyrnidae: Scalloped hammerhead Sphyrna ligo: Fraser-Brunner, 1950: Sphyrna mokarran: Nine of them belong in the genus Sphyrna. Hammerheads can grow quite large, with some hammerheads weighing as much as much 1,300 pounds. Scalloped Hammerhead . .
However, the between- . It is readily accessible to inshore fishers as well as offshore commercial operations. It is found in Coastal-Pelagic areas all . Originally known as Zygaena lewini, the name of its genus was later renamed to its current name. The hammerhead shark is a group of species in the family Sphyrnidae. The newborn cryptic sharks, however, were found mainly along the South . The scalloped hammerhead (Sphyrna lewini), also known as the bronze, kidney-headed, or southern hammerhead, is a species of Hamvvvmerhead shark. Indian Ocean Diet Carnivore Status Critically Endangered The scalloped hammerhead is a species of hammerhead shark, and part of the family Sphyrnidae. With the majority of hammerhead catch being labeled as "hammerhead" instead of individual species, managers are unable to accurately assess the status of specific hammerhead species. The scalloped hammerhead shark, like many other species, uses the shore as a breeding ground. The bonnethead, scalloped, and Carolina hammerhead sharks are members of the family Sphyrnidae and reside in the genus Sphyrna (9 species). Their unusual head looks like a hammer. scalloped hammerhead Scalloped Hammerhead Shark FWS Focus overview geography timeline Overview Scientific Name Sphyrna lewini Common Name scalloped hammerhead Scalloped Hammerhead Shark FWS Category Fishes Kingdom Animalia Location in Taxonomic Tree Genus Sphyrna Species Sphyrna lewini Identification Numbers TSN: 160508 Geography This genus has a rounded or slightly pointed snout, short gill slits, and a broadly arched mouth.
as a genus, but fishermen have trouble telling the hammerhead species apart. This "hammer" on its head is also known as the "cephalofoil". 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. 12. The scalloped hammerhead, Sphyrna lewini, is a shark species of the genus Sphyrnaand that belongs to the family of Sphyrnidae. While the other species of hammerhead sharks belong to the genus Sphyrna, the Winghead shark has a genus of its own, known as Eusphyra.
Scalloped hammerheads are named after their head, which is arched and has seven indentations or notches, like a scallop. The common name "hammerhead" can be liberally applied to nine separate species of shark globally. It's "hammer head" is believed to be a device that helps these sharks steer and turn quickly through the ocean. Scalloped hammerheads are named Great hammerheads are usually solitary swimmers. The scalloped hammerhead is an endangered pelagic shark found in warm temperate and tropical seas around the world. Genus - Sphyrna Species - mokarran Common Names. All 9 species of the hammerhead belong in the family Sphyrnidae and the genus Sphyrna. Scalloped Hammerhead, Sphyrna lewini. Disclaimer: The Animal Diversity Web is an educational resource written largely by and for college students.ADW doesn't cover all species in the world, nor does it include all the latest scientific information about organisms we describe. Due to high metabolic rates, young scalloped hammerhead sharks need a lot of food, or they will starve. There are nine different species from the family Sphyrnidae so far. Keywords frequently search together with Female Philopatry Narrow sentence examples with built-in keyword filters The first dorsal fin is high and second dorsal and pelvic fins are low. The Great Hammerhead is the largest of all nine species of Hammerhead Shark. Can a hammerhead shark bite a human? They are threatened by commercial fishing, mainly for the shark fin trade. The scalloped hammerhead shark belongs to the order carcharhiniformes, of the family Sphyrnidae sharks and genus Sphyrna. The scalloped bonnethead is a rare species of hammerhead found in the Eastern Pacific, from Mexico to Peru. Females are larger . Although their distinctive body shape makes hammerheads easy to identify as a genus, it can be diffi cult to distinguish scalloped hammerheads from the similar-looking smooth (S . Scientific Name Author Valid Name Family English Name; . belong to the Genus Sphyrna with one exception, the winghead shark (E. blochii), which is the sole species in the Genus Eusphyra. They have a moderately slender fusiform body with a tall first dorsal fin and low second dorsal and pelvic fins. Named for their characteristic, laterally flattened heads formed into what is known as a cephalofoil, most hammerheads belong to the genus Sphyrna, while one, the winghead shark, belongs to the genus Eusphyra, of which it is the sole member. Other species known from the genus Sphyrna are the great hammerhead shark (Sphyrna mokarran), the scalloped hammerhead shark (Sphyrna lewini), smooth hammerhead shark (Sphyrna zygaena), and the bonnethead shark (Sphyrna tiburo). The genus is a combination of the Greek words for "true" and "hammer" and means that the winghead is in a different category to other hammerhead species. . The exceptions are associated with sedentary behaviour, disjunct distributions, or reproductive philopatry. It is found in warm temperate and tropical waters, worldwide from 46N to 36S. They can also be confused with a smaller genus of shark, Rhizoprionodon sp., the sharpnose sharks.