The melon is a oily, fatty lump of tissue found at the centre of the forehead of most dolphins and toothed whales. The function of the melon is not completely understood, but scientists believe it provides a means of focusing sounds used in echolocation. Some scientists also believe the melon may function in deep diving and buoyancy. Melon size tends to increase in toothed whales that dive deep. Some species' melons are more developed and specialized than others. The Sperm Whale has specialized sufficiently that the oil within the organ is chemically distinct from that found in other toothed whales. In fact the differences in size and composition are so great that the organ has its own name - see Sperm Whale. Genera See article below. ... Families See text The toothed whales (systematic name Odontoceti) form a suborder of the cetaceans. ... See: Animal echolocation: animals emitting sound waves and listening to the echo in order to locate objects or navigate. ... [[{{{diversity_link}}}|Diversity]] {{{diversity}}} Binomial name Physeter macrocephalus Linnaeus, 1758 Trinomial name {{{trinomial}}} Type Species {{{type_species}}} {{{subdivision_ranks}}} Sperm Whale range (in blue) Synonyms {{{synonyms}}} The Sperm Whale (Physeter macrocephalus) is the largest of the toothed whales and is believed to be (with the possible exception of some sauropod dinosaurs) the largest... [[{{{diversity_link}}}|Diversity]] {{{diversity}}} Binomial name Physeter macrocephalus Linnaeus, 1758 Trinomial name {{{trinomial}}} Type Species {{{type_species}}} {{{subdivision_ranks}}} Sperm Whale range (in blue) Synonyms {{{synonyms}}} The Sperm Whale (Physeter macrocephalus) is the largest of the toothed whales and is believed to be (with the possible exception of some sauropod dinosaurs) the largest...

The melon of the Beluga is also unique. Part of its adaption to its icy environment is to do more with its melon (though scientists aren't exactly sure what) by changing its shape at will. Binomial name Delphinapterus leucas (Pallas, 1776) Beluga range The Beluga Whale or White Whale (Delphinapterus leucas) is an Arctic and sub-arctic species of cetacean. ...