Many people visit aquariums hoping to catch a glimpse of sharks up close, especially the great white, but no exhibit like this exists anywhere in the world.
Since 1955, numerous attempts have been made by aquariums to place great white sharks into captivity, but marine biologists believe that, because we are unable to create a suitable artificial environment for them, it causes the sharks to become depressed. They aren’t at all happy with their new environment.
A common behaviour among great whites in captivity is to ram their heads into the walls of their tanks. There are several theories for why this happens. Some scientists believe that being in a tank disrupts the great white’s keen sense of electroreception, which allows them to sense the electrical charges in the water around them, making it difficult for sharks to detect the tank walls.
See the video for more reasons on why we cant keeps great white's in captivity