Sperm whale key features

State of Connecticut Sites, Seals and Symbols. Like other toothed whales, the sperm whale can retract and protrude its eyes, thanks to a 2-cm-thick retractor muscle attached around the eye at the equator, [] but are unable to roll the eyes in their sockets. The pyramidal tract is poorly developed, reflecting the reduction of its limbs. Humpback whale M. The total number of sperm whales in the world is unknown, but is thought to be in the hundreds of thousands. In some mid-latitudes, sperm whales seem to generally migrate north and south depending on the seasons, moving toward the poles in the summer.

Husson and Lipke Holthuis proposed that the correct name should be P. Although the fossil record is poor, [] several extinct genera have been assigned to the clade Physeteroidea , which includes the last common ancestor of the modern sperm whale, pygmy sperm whales , dwarf sperm whales , and extinct physeteroids. Site developed by Woodlands Design. Parvorder Mysticeti Baleen whales. Do sperm whales have any predators? Arnoux's beaked whale B.

BBC News. Melon-headed whale P. Balaenoptera Common minke whale B. The highest sound pressure level ever recorded from an animal was from a sperm whale off the coast of northern Norway. University of California Press.