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whale louse
A whale louse is a commensal crustacean of the family Cyamidae. Despite the name, they are not true lice (which are insects), but rather are related to the better-known skeleton shrimp, most species of which are found in shallower waters. Whale lice are external parasites, found in skin lesions, genital folds, nostrils and eyes of marine mammals of the order Cetacea. These include not only whales but also dolphins and porpoises.
==Appearance==
The body of a whale louse is distinctly flat and considerably reduced at the rear. Its legs, especially the back three pairs of legs, have developed into claw-like protuberances with which it clings to its host. Its length ranges from depending on the species.
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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