Small, bottom dwelling sharks (Nurses, etc.) are shipped like all other fish. Larger sharks, as well as pelagic sharks are shipped in LARGE boxes.
Beware of shipping charges if ordering a shark online, as the freight can easily hit $100.
Do you have the space for a shark? Please don't buy a Blacktip, Nurse, Leopard, Lemon, etc. They get too big and don't belong in a home aquarium, unless you are a multi-gazillionaire.