Sharks are cartilaginous predatory fish, the ancestors of which come from the Devonian period. The nature has equipped them with amazing senses. Apart from the senses of sight, hearing, smell, taste and touch, they have the lateral line that makes it possible to sense even the most delicate water movements. What is more, that have the sense of electroception, which is used to detect changes of electric field. Sharks have the largest brains among all the fish.
