The world's largest predator in the fish genus, the great white shark averages 15 feet in length but can reach lengths of 20 feet and weights of more than 5,000 pounds. Some reports have indicated the great white can grow to 26 feet and weigh as much as 7,300 pounds.
Great whites are characterized by their bulky, torpedo-shaped bodies, conical snouts and countershaded exteriors. The blue-and-white countershading of the great white renders it difficult to detect from either above or below the water's surface. This adaptation is effective for ambush tactics, which the great white uses on its prey. The great white preys on a myriad of fish, marine mammals and even seabirds, and it is preyed upon only by the killer whale.