To help you find the answer, I need to know:
* Where are you trying to feed the shark? Is it at a specific aquarium, a marine park, or somewhere else?
* Are you a visitor or a staff member? Different rules apply for each.
* What kind of shark are you trying to feed? This will determine the type of food and the method of feeding.
Once I have more information, I can give you a more helpful and accurate response.