Very few sharks are suitable for home aquariums. Bamboo and Epaulette probably being the best options. Both get over 2 feet long and require hundreds of gallons. Probably 300 gallon minimum. They will also need large areas of andy bottom to rest on. Certain aquarium fish such as angels will pick on them, particularly their eyes, so a species tank is best.
You'll also need a very strong filtration system to handle the waste of a predator of that size.
So, how big is your tank, how is it aquascaped, and what else is in it?
Someone stop me! Please! But... not just yet...
55 Gal Tropical FW
55 Gal Mixed Reef