Fins, skin, and teeth are also harvested from sphyrnids, and many larger hammerhead sharks are prized as sport fish. You can make it easier for us to review and, hopefully, publish your contribution by keeping a few points in mind.
They are known to be cannibalistic but the reasons remain unclear.
Most hammerhead species are fairly small and are considered harmless to humans. The origin of the first dorsal fin is opposite or slightly behind the pectoral fin axil with the free rear tip reaching to above the origin of the pelvic fins.
The rear margins of the pelvic fins are concave and falcate in shape, not seen in scalloped hammerhead S. The cephalofoil has a gentle curve in juvenile sharks but becomes straight as the shark ages. Viviparity means that the eggs hatch inside the female's body and the babies are fed by a placenta which transfers nourishment from the mother via an umbilical cord connected to the pup between the pectoral fins. You may find it helpful to search within the site to see how similar or related subjects are covered.
Endangered In the US, hammerheads with the exception of the bonnethead which is a much smaller coastal species are grouped with large coastal species, a group that biologists consider to be particularly vulnerable to overfishing.
There are 4 large species: Nami-shumokuzame, Hira-shumokuzame Malay: Learn More in these related Britannica articles: They occur widely throughout the world's oceans in depths ranging from 1- 300 m.
Please try again later. Hammerheads are known for their schooling behavior and consume a variety of prey including rays, other sharks, fish, squid, and crustaceans There are nine species of hammerhead sharks worldwide in the family Sphyyrnidae. Although not targeted, the Great hammerhead is taken by gillnet and longline and as bycatch in driftnet fisheries.
Jennifer Kennedy is an environmental educator who has more than 20 years of experience studying and educating the public about the oceans. Any text you add should be original, not copied from other sources.
The pores are gel-filled and serve as highly sensitive electrical receptors that are used, among other things, to detect the electrical signals that are emitted by potential prey items — including those that are buried under the sand such as stingrays.
The great hammerhead, however, is the largest of the 9 species of hammerhead sharks and is reported to reach up to 6. They do not actively seek out human prey, but are very defensive and will attack when provoked.
The great hammerhead is the largest of the hammerheads in the family Sphyrnidae. Australian Journal of Marine and Freshwater Research 40: The Great Hammerhead is the largest reaching a length up to 20 feet and weighing as much as 1,000 pounds.