Marine predators are animals that hunt and feed on other marine life. The most common marine predators are the ORCA, a type of dolphin, the SHARK, the EEL, the TUNA, and the Thresher SHARK. The ORCA is a large, powerful predator that feeds on fish, seals, and even whales. The SHARK is a large, predatory fish that feeds on smaller fish and invertebrates. The EEL is a long, slender fish that feeds on small fish and crustaceans. The TUNA is a large, fast-swimming fish that feeds on smaller fish and squid. The Thresher SHARK is a large, predatory SHARK that feeds on small fish and squid.