The tiger shark is a species of requiem shark and the only extant member of the genus Galeocerdo. It is a large macropredator, capable of attaining a length over 5 m. Populations are found in many tropical and temperate waters, especially around central Pacific islands. This species of shark is primarily solitary, and hunts at night, making it nocturnal. They range into shallower waters at night to feed, and move back to deep waters during the day. While they are usually solitary, when feeding on carcasses they can congregate in large groups. The tiger shark is a non-selective feeder and a voracious predator. It has been known to consume a wide variety of marine prey and even some terrestrial animals. Common prey include crabs, shellfish, lobsters, squid, bony fish, small sharks, skates, rays, porpoises, turtles, marine birds and mammals. Tiger sharks are a highly migratory species with a distribution that stretches from Cape Cod, Massachusetts to Florida and the Gulf of Mexico. They prefer warm waters (roughly 72 degrees Fahrenheit or warmer).