actually bunji there are a few that are okay for a home aquarium as long as its 250 gallons or upward. the cat shark (not the part fw one) is okay for a 250 gallon, so is the bamboo shark, smoothound, and possibly an epaulette. the horn shark might be okay in something like a 350 but not many people can house one. they are extremely difficult to keep. of course sharks like the port jackson, leopard, lemon, and reef shakrs hsould be left to public aquariumsAnyone who keeps a fish the size of a shark in a home aquarium is retarded.
They need to be in a public aquarium at the bare minimum ideally they are left back in the ocean. They arent like alot of marine tropical fish that stay in a very similar spot for the duration of their life. Sharks will cover vast areas of water, some constantly scavanging, others decending to the reefs at night to feed on an unsuspecting grouper or something equally substantial.
I know you were just curious, but unless you are thinking of looking at one of the types of smoothound that is realistically able to be kept in a home aquarium, then dont bother at all.
Ben
the cat shark and bamboo shark are two tpes of shark that do not need to be moving in order to get oxygen. they can breathe fine sitting in one place