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| Pygmy Sperm Whale
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| Kogia breviceps Blainville, 1838 | ||||||||||||||||||
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There has been debate and differing opinion as to the correct classification of the Pygmy and Dwarf Sperm Whales (see Sperm Whale family for details). Until 1966, the two species were widely considered to actually be the same species. That year a scientist at the Smithsonian Institute definitively diagnosed them as separate species. The Pygmy Sperm Whale was first named by Blainville in 1838.
Like its giant cousin, the Sperm WhaleThe Sperm Whale Physeter macrocephalus is the largest of the toothed whales and is the largest toothed animal in the world. The whale was named after the milky-white substance spermaceti found in its head and originally mistaken for sperm. The Sperm Whale, the Pygmy Sperm Whale has a spermaceti organ in its forehead (see the Sperm WhaleThe Sperm Whale Physeter macrocephalus is the largest of the toothed whales and is the largest toothed animal in the world. The whale was named after the milky-white substance spermaceti found in its head and originally mistaken for sperm. The Sperm Whale for a discussion of its purpose). It also has a sac in its intestines that contains a dark red fluid. The whale will expel this fluid when frightened. Its purpose is believed to be to confuse and disorientate predators.
The Pygmy Sperm is amongst the smallest of all whales and is not much larger than many dolphinThis article is about the dolphin mammal. For other uses of the term, please see dolphin (disambiguation). See article below. Dolphins are certain aquatic mammals related to whales and porpoises. The word is used in a few different ways. It can mean: #anys. They are about 1.2m at birth, growing to about 3.5m at maturity. Adults weigh about 400kg. Roughly speaking the underside is a creamy, occasionally pinkish, colour and the back and sides are a bluish grey. However there is considerable intermixing between the two colours. The head is large in comparison to body size, given an almost swollen appearance when viewed from the side. The lower jaw is very small and slung low. The blowhole is displaced slightly to the left when viewed from above facing forward. The dorsal finDorsal Fin of the Orca A dorsal fin is a fin located on the backs of fishes, whales, dolphins and porpoises. Its main purpose is to stabilise the animal against rolling and assist in sudden turns. Some animals have developed dorsal fins with protective fu is very small indeed and hooked. Its size is considerablely smaller than the Dwarf Sperm Whale and may this may be used for diagnostic purposes. The Pygmy Sperm has between 20 and 32 teeth all of which are set into the lower jaw only. There is false gill behind each eye.
This whale makes very inconspicious movements. It rises to the surface slowly, with little splash or blow, and will remain there motionless for some time. In Japan the whale was historically known as the "floating whale" because of this. Its dive is equally lacking in grand flourish - it simply drops out of view. The species has a tendency to back away from rather than approach boats. Breaching has been observed, but is not common.
Pygmy Sperms are usually solitary creatures but have been seen in groups of upto six. Primary food sources are squidThis article is about the sea animal. For other uses of "squid", see Squid (disambiguation). Myopsina Oegopsina The squid is a marine mollusk of the class Cephalopoda, subclass Coleoidea, order Teuthida of which there are two major suborders, Myopsina and and crabCrabs are various species of decapods. They are crustaceans with five pairs of legs, the first pair modified to form a pair of pincers, a flattish shell, and a short, broad abdomen folded under its thorax. There are two main groups of crabs: the Brachyuras.
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