Grey nurse sharks diet
Since then, sharks have diversified into over 500 species. Modern sharks are classified within the clade Selachimorpha (or Selachii ) and are the sister group to the rays. Catch Hayley Atwell in full episodes of Conviction. Hang with the Huangs on Fresh Off the Boat. Sharks belong to the superorder Selachimorpha in the subclass Elasmobranchii in the class Chondrichthyes. megalodon is also primarily known from its fossil teeth and vertebrae. The teeth consist of easily fossilized calcium phosphate, an apatite. Watch 360-degree videos from a Magical Holiday Celebration. The presence of whole fish arranged tail-first in their stomachs suggest that they were fast swimmers with great agility. These sharks attained gigantic proportions and include the extinct megatoothed shark, C. Well-known species such as the great white shark, tiger shark, blue shark, mako shark, and the hammerhead shark are apex predators —organisms at the top of their underwater food chain. From the small number of teeth found together, it is most likely that Cladoselache did not replace its teeth as regularly as modern sharks. Many shark populations are threatened by human activities. megalodon.
Sharks are a group of fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the head. The Wonderful World of Disney: Magical Holiday Celebration. Estimates suggest that sharks grow tens of thousands of teeth over a lifetime, which explains the abundant fossils. Partial skeletons and even complete fossilized remains have been discovered. Most fossil sharks from about 300 to 150 million years ago can be assigned to one of two groups. Its caudal fins had a similar shape to the great white sharks and the pelagic shortfin and longfin makos. These Sharks would love to make you their chum. Get the latest on How To Get Away with Murder. Megalodon (top two, estimated maximum and conservative sizes) with the whale shark, great white shark, and a human for scale. Stream your favorite shows to your TV with Chromecast. In early white shark evolution there are at least two lineages: one lineage is of white sharks with coarsely serrated teeth and it probably gave rise to the modern great white shark, and another lineage is of white sharks with finely serrated teeth. Like most extinct sharks, C.
