An example for sharks would be their self-replacing teeth. Ampullae may also be used by some species to communicate with weak electrical signals. Benthic Describing organisms that inhabit the region of a body of water that includes the bottom of a lake, sea, ocean, river, etc. The tough tissue that forms the skeleton of all members of Chondrichthyes. It provides a strong yet flexible support for the shark.
Cartilage is found in other animals as well but is usually only present in embryos and young.
Our nose is made of cartilage and we also have cartilage in our ears, and it forms caps on the ends of our bones. Caudal Fin The tail fin of a fish. In sharks, the upper lobe of the fin is generally larger and longer than the lower lobe and it speculated that the longer upper lobe generates lift for the swimming shark. The detection of chemicals in an environment. Two types of chemoreceptive organs exist.