In what ways does a shark rely on its eyesight?

Also unlike other animal orders, the size and function of the eye can vary greatly amongst shark species. Sharks are uniquely and amazingly adapted to their in environments in every way including eyesight. Lisney and Collin (2007) conducted a study on the absolute and relative eye size of 46 elasmobranch species. read more

Shark eyesight depends largely on where the shark is located. Because sharks are located at all depths of the ocean from close to the surface, to the dark depths where a natural light is almost non-existent. Surface and reef dwelling sharks have eyes that can detect light, movement and shadows fairly well. read more

Most all sharks have a fairly wide field of view, however, since their eyes are positioned on each side of the head. The most extreme example of this is the hammerhead, whose eyes actually protrude out from the head. ­Many shark species also rely heavily on their sense of taste. read more

Sharks' eyes are protected when attacking prey. Also unlike humans, shark eyelids serve to protect the eye when attacking prey. Some sharks have a nictating membrane, or a clear membrane that covers and protects the eye when a shark bites its prey. read more