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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 (or Selachii) and are the sister group to the Batoidea ( rays and kin).
Hace 3 días · shark, any of numerous species of cartilaginous fishes of predatory habit that constitute the order Selachii (class Chondrichthyes ). Sharks, together with rays and skates, make up the subclass Elasmobranchii of the Chondrichthyes.
17 de jul. de 2019 · Jennifer Kennedy. Updated on July 17, 2019. Sharks are cartilaginous fish in the class Elasmobranchii. There are about 400 species of sharks. Below are some of the best-known varieties of sharks, along with facts about sharks that you may not know. Whale Shark (Rhincodon typus) crisod / Getty Images.
The ground sharks (Carcharhiniformes) are some of the most familiar sharks, including tiger sharks, bull sharks, reef sharks, hammerhead sharks and catsharks. They are defined by an elongated snout and nictitating membrane, and there are more than 270 species.
Learn about sharks, the ancient and diverse fish that are top predators of the ocean. Find out how sharks are classified, what they look like, how they hunt, and why they are threatened by human activities.
We Know Sharks LEARN ABOUT SOME OF THE 400+ SPECIES OF SHARKS. All organisms have scientific names, a name that is unique for each species. Every species has two Latin names which allow people to be certain they are talking about the same creature no matter what language they speak.
Characteristics. Diet and hunting. Fins. Senses. Smell. Sight. Sensing electric current. Hearing. Lateral line. Reproduction. New shark discoveries. Fishing. Shagreen. References. Other media. Sharks are a superorder of fish. This superorder is also known by its scientific name Selachimorpha.
