Their primary sense is the ability to smell. Their next important sense is the ability to detect electric charges. They can pick up electrical charges as small as 0.005 microvolts. The prey can be detected by the electrical field generated by a beating heart or gill action. Fish in hiding can also be detected this way.
Some females migrate to warmer water to give birth in the fall.
A Shark in Captivity Great White Sharks aren't usually kept in captivity. Most of the time, they are brought in because they are injured or sick, and they do not usually survive long. One healthy shark, nicknamed Sandy, was brought into captivity in 1980. The aquarium was donut-shaped, and visitors watched from a central viewing area. The tank was set up for fast swimming fish, with a current going around against which the fish swam.