10 Amazing Sharks You Never Knew Existed A sawshark is a distinct looking shark named for its long saw-like snout. Leopard sharks are so named for their dark saddle-shaped spots along their back and fins. The dark grey or black patterning on an otherwise silver body resembles a similar spotting to that of a leopard. Blue sharks live in open water and are very migratory. They can be found in almost all parts of the ocean, with a huge range. Sharks are some of the most intriguing and often ... Shark , any of numerous species of cartilaginous fishes that make up the order Selachii (class Chondrichthyes). Most species have a tough skin that is dull gray in color and roughened by toothlike scales. The mouth contains sharp triangular teeth. Sharks lack a swim bladder and must swim to keep from sinking. Learn about some of the 400+ types of sharks . Find information on great white sharks , blue sharks , hammerheads, whale sharks , and more. Sharks are a group of elasmobranch cartilaginous fishes characterized by a ribless endoskeleton, dermal denticles, five to seven gill slits on each side, and pectoral fins that are not fused to the head. Modern sharks are classified within the division Selachii[1] and are the sister group to the Batomorphi (rays and skates). Some sources extend the term "shark" as an informal category including extinct members of Chondrichthyes (cartilaginous fish) with a shark-like morphology, such as ...
