Shark - Wikipedia
WEBShark. † Synechodontiformes. Sharks are a group of elasmobranch 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. Modern sharks are classified within the clade Selachimorpha[1] (or Selachii) and are the sister group to the Batoidea (rays and kin).
Shark Species - Shark Research Institute
WEBFacts about many sharks from the eight orders of sharks from the Shark Research Institute (SRI). SRI conducts and sponsors rigorous, peer-reviewed field research about sharks and uses science-based information to educate and advocate for shark conservation policies and protections by the world’s gov
Sharks 101 | National Geographic - YouTube
WEBSharks can rouse fear and awe like no other creature in the sea. Find out about the world's biggest and fastest sharks, how sharks reproduce, and how some sp...
Shark | Attacks, Types, & Facts | Britannica
WEBSep 11, 2024 · Riverine sharks are small to medium-sized and are exceptionally voracious and bold. 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, explained - National Geographic
WEBSharks can rouse fear and awe like no other creature in the sea. Find out about the world's biggest and fastest sharks, how sharks reproduce, and how some species are at risk of extinction.
12 Shark Facts That May Surprise You | NOAA Fisheries
WEBJul 17, 2018 · A night shark's green eye. 3. Sharks have special electroreceptor organs. Sharks have small black spots near the nose, eyes, and mouth. These spots are the ampullae of Lorenzini – special electroreceptor organs that allow the shark to sense electromagnetic fields and temperature shifts in the ocean. 4.