Sharks are a type of fish with a full cartilaginous skeleton and a highly streamlined body.Sharks have more than 440 species, ranging in size from the small dwarf lanternshark, Etmopterus perryi, a deep sea species of only 17 centimetres in length, to the whale shark, Rhincodon typus, the largest fish, which reaches approximately 12 metres. Sharks are found in all seas and are common down to depths of 2,000 metres. They generally do not live in freshwater, with a few exceptions such as the bull shark and the river shark which can live both in seawater and freshwater. They breathe through five to seven gill slits. Sharks have a covering of dermal denticles that protects their skin from damage and parasites, and improves their fluid dynamics so the shark can move faster. They have several sets of replaceable teeth. Well-known species such as the great white shark, tiger shark, blue shark, mako shark, and the hammerhead are apex predators, at the top of the underwater food chain.
Image of Shark
Image of Whale Shark
Image of Shark
Image of hammerhead Shark
No comments:
Post a Comment