The common answer to what sharks eat would be…seals, whales, people!? Turns out of the 350 shark species only about 20 are dangerous to humans. Most sharks that are resposabile for human attacks really not intrested in human flesh and much prefer the taste of seals, whales, dolphins, tuna, and other large fish. Although the most popular sharks are known to eat large fish and mammals, a majority of sharks are known for eating smaller fish and crustaceans. Basking sharks, Whale sharks and Megamouth sharks all have different ways of feeding through filtering feeding. This is the process in which sharks use gill rakers to sift food through their mouth and gills.