The Sperm Whale forms the largest known species of toothed whale. They appear to be endemic to every ocean on earth but seem most numerous around the equator, and at the edges of ice packs in both hemispheres.
The Sperm Whale lives as a migratory cetacean. However, their migratory patterns remain less understood than most other baleen whales. For centuries, men hunted them, yet despite this, unlike many other species of whale, their population remains quite extensive.
Exact estimates cannot be made, therefore, only extrapolations available. These put their extant numbers anywhere between 200,000 and 1.5 million individuals.
Sperm Whale Physical Description
You can easily distinguish and recognize the Sperm Whale by its extremely large head, relative to body length. Varying among individuals, their head represents between 25-35 percent of their entire body length.
This species also displays the greatest degree of sexual dimorphism of any known cetacean. An adult male Sperm Whale sometimes reaches 52 ft (16 m) in length and averages roughly 90,000 lb (40,823 kg) in weight.
The significantly smaller females attain a length of around 36 ft (11 m) and weigh about 30,000 lb (13,607 kg).
In color, the Sperm Whale predominantly displays a dark gray, and small white patches occasionally present themselves.
Sperm Whale Habitat and Diet
In general, the Sperm Whale prefers to inhabit regions with a water depth of at least 1968 ft (600 m), and typically much greater. They rarely inhabit areas with a depth of less than 984 ft (300 m).
The genders appear to prefer different depths, with the females going for shallower waters of roughly 3,280 ft (1,000 m), while the males prefer it deeper. Both genders have the ability to stay submerged for between 35-60 minutes, before returning to the surface for air.
The mammal primarily feeds on the larger species that share their deeper habitat. The majority of their prey consists of skates, sharks, squids, and larger fish.