If I were a shark and the overlord in the ocean, all fish would be afraid of me.they respire with the use of five to seven gill slits. sharks have a covering of dermal denticles that protect their skin from damage and parasites and improve fluid dynamics. they have several sets of replaceable teeth.

sharks range 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 grows to a length of approximately 12 metres and which feeds only on plankton, squid, and small fish through filter feeding.