What type of animal has spermaceti in its head?
Spermaceti Spermaceti Spermaceti (from Greek "sperma" meaning "seed", and "ceti", the genitive form of "whale") is a waxy substance found in the head cavities of the sperm whale (and, in smaller quantities, in the oils of other whales). Spermaceti is created in the spermaceti organ inside the whale's head. This organ may contain as much as of spermaceti. Two theories for the spermaceti organ's biological function suggest it either controls buoyancy, or acts as a focusing apparatus for the whale's sense of echolocation. There has been concrete evidence to support both theories. The buoyancy theory holds that the sperm whale is
Spermaceti organ investment in this organ suggests that the organ must have adaptively advantageous functionality. However, the nature of its function hasn’t been clearly understood historically. The two prevailing hypotheses proposed regarding the spermaceti organ’s function are that 1) it assists in controlling buoyancy via manipulation of the contained spermaceti oil's temperature and, in consequence, its density, facilitating deep diving by cooling and surfacing by warming, as well as allowing the animal to remain motionless at great depth and 2) it essentially functions as a sonar aiding the whale in echolocation. The hypotheses that the spermaceti organ is involved in buoyancy manipulation