Sharks can home in on prey by its sounds. Some scientists believe that the shark's lateral line detects the lowest-pitched sounds. The lateral line is a sensory system of fluid-filled canals that runs down both sides of the shark's body, from its head to its tail. The lateral line, sometimes called distant touch, also detects water movement. Sharks have highly sensitive eyes that can see extremely well in dim light.
Sharks even possess a crude form of color vision.
However, they may not be able to see details clearly. It was once widely believed that sharks relied mainly on their sense of smell to hunt prey. However, little evidence exists of a special sensitivity for smells in sharks. Sharks can detect incredibly small electrical fields. The head of a shark has a large number of small pores that lead to an elaborate system of sensory tubes.