It is the only living member of genus Physeter and one of three extant species in the sperm whale familyalong with the pygmy sperm whale and dwarf sperm whale of the genus Kogia. The sperm whale is a pelagic mammal with a worldwide range, and will migrate seasonally for feeding and breeding.
The females cooperate to protect and nurse their young. Females give birth every four to twenty years, and care for the calves for more than a decade.
A mature sperm whale has few natural predators, although calves and weakened adults are sometimes killed by pods of orcas killer whales.
Sperm whales can live for more than 60 years. Spermaceti sperm oilfrom which the whale derives its name, was a prime target of the whaling industry, and was sought after for use in oil lamps, lubricants, and candles.
Ambergrisa solid waxy waste product sometimes present in its digestive system, is still highly valued as a fixative in perfumesamong other uses. Beachcombers look out for ambergris as flotsam.
The species is protected by the International Whaling Commission moratorium, and is listed as vulnerable by the International Union for Conservation of Nature. The name sperm whale is a truncation of spermaceti whale. Spermacetioriginally mistakenly identified as the whales' semenis the semi-liquid, waxy substance found within the whale's head see below.
The etymological dictionary of Corominas says the origin is uncertain, but it suggests that it comes from the Vulgar Latin cappulaplural of cappulum"sword hilt".
Teeth Another synonym australasianus " Australasian " was applied to sperm whales in the southern hemisphere.
The sperm whale belongs to the order Cetartiodactyla     the order containing all cetaceans and even-toed ungulates. It is a member of the unranked clade Cetaceawith all the whales, dolphins, and porpoises, and further classified into Odontoceticontaining all the toothed whales and dolphins.
It is the sole extant species of its genus, Physeterin the family Physeteridae.
Two species of the related extant Make him sperm at the beach Kogiathe pygmy sperm whale Kogia breviceps and the dwarf sperm whale K.
The sperm whale is one of the species originally described by Linnaeus in in his eighteenth century work, Systema Naturae. He recognised four species in the genus Physeter. Both names are still used, although most recent authors now accept macrocephalus as the valid name, limiting catodon' s status to a lesser synonym. Untilthe species was generally known as P. This proposition was based on the grounds that the names were synonyms published simultaneously, and, therefore, the ICZN Principle of the First Reviser should apply.
In this instance, it led to the choice of P. Holthuis and more recent discussions with relevant experts. The sperm whale is the largest toothed whale, with adult males measuring up to A similar size is reported from a jawbone from the British Natural History Museum.
A 20m specimen is reported from a Soviet whaling fleet near the Kuril Islands in Extensive whaling may have decreased their size, as males were highly sought, primarily after World War II. It is among the most sexually dimorphic of all cetaceans. The sperm whale's unique body is unlikely to be confused with any other species. Make him sperm at the beach sperm whale's distinctive shape comes from its very large, block-shaped head, which can be one-quarter to one-third of the animal's length.
The S-shaped blowhole is located very close to the front of the head and shifted to the whale's left. The sperm whale's flukes tail lobes are triangular and very thick. Proportionally, they are larger than that of any other cetacean, and are very flexible. The largest ridge was called the 'hump' by whalers, and can be mistaken for a dorsal fin because of its shape and size.
In contrast to the smooth skin of most large whales, its back skin is usually wrinkly and has been likened to a prune by whale-watching enthusiasts. The ribs are bound to the spine by flexible cartilage, which allows the ribcage to collapse rather than snap under Make him sperm at the beach pressure.
Bones show the same pitting that signals decompression sickness in humans. Older skeletons showed the most extensive pitting, whereas calves Make him sperm at the beach no damage. This damage may indicate that sperm whales are susceptible to decompression sickness, and sudden surfacing could be lethal to them. Like that of all cetaceans, the spine of the sperm whale has reduced zygapophysial jointsof which the remnants are modified and are positioned higher on the vertebral dorsal spinous process, hugging it laterally, to prevent extensive lateral bending and facilitate more dorso-ventral bending.
These evolutionary modifications make the spine more flexible but weaker than the spines of terrestrial vertebrates.
Like that of other toothed whalesthe skull of the sperm whale is asymmetrical so as to aid echolocation. Sound waves that strike the whale from different directions will not be channeled in the same way.
The sperm whale's lower jaw is very narrow and underslung. One hypothesis is that the teeth are used in aggression between males. Rudimentary teeth are also present in the upper jaw, but these rarely emerge into the mouth.
Like the age-rings in a tree, the teeth build distinct layers of cementum and dentine as they grow. The brain is the largest known of any modern or extinct animal, weighing Make him sperm at the beach average about 7. Elephants and dolphins also have larger brains than humans.
The sperm whale's cerebrum is the largest in all mammalia, both in absolute and relative terms. The olfactory system is reduced, suggesting that the sperm whale has a poor sense of taste and smell. By contrast, the auditory system is enlarged.