This toothed whale feeds on giant deep-water squid and large fish. Males grow up to 65 feet long, females up to 56 feet. Sperm whales can be identified at a distance by a spout from their blowhole, directed slightly forward and to the left. Sperm whales travel in nursery schools of up to 50 females of all ages and immature males. A male school consists of sexually mature males.
Mature bulls visit female schools during mating season.
Short-finned Pilot whales are found in offshore warm temperate and tropical waters. They are smaller than sperm whales, growing up to 18-22 feet long, and have rounded, bulbous heads and pronounced dorsal fins. They live in groups of 10-60 individuals and are somtimes seen traveling with dolphins. They feed mainly on squid.