What is the different between a whale shark and a shark?

Leopard sharks (Triakis semifaciata) are more sluggish, and eat shellfish and small fish. The tiger sharks (Galeocerdo cuvier) are more aggressive, and have been known to eat almost anything (including license plates, overcoats, frozen chicken....). Tiger sharks are considered dangerous by humans, but both are extremely susceptible to humans' finning and habitat degradation.