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Pleurobrachia pileus
''Pleurobrachia pileus'' is a species of comb jelly, commonly known as a sea gooseberry. It is found in open water in the northern Atlantic Ocean, the North Sea, the Baltic Sea and the Black Sea, and was first described by the Danish zoologist Otto Friedrich Müller in 1776.
==Description==
''Pleurobrachia pileus'' is a small, globular or ovoid comb jelly up to about in length. It has a pair of long tentacles that are used to catch prey and can be retracted into sheaths. The tentacles are up to twenty times the length of the body and are fringed with filaments along one edge.〔 The body bears four pairs of longitudinal rows of cilia known as combs which extend about three quarters the length of the animal between its mouth and its aboral (opposite) end. The cilia are mounted on short transverse plates which are bioluminescent. It is the beating of the cilia in synchrony that allows the animal to swim and that gives it an iridescent appearance. The body is transparent and the comb rows milky white. The tentacles, sheaths and pharynx are also milky white, or dull orange in some individuals.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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