...Many species have developed various habits, such as males and females displaying and building nests before spawning, and males guarding the eggs. There are also cleaner fish that feed mainly on external parasites of larger fish. This species is also known for its habit of sleeping at night, and some aquariums have tanks with reversed day and night, allowing people to observe fish such as the Japanese stingray (illustration) burrowing into the sand to sleep. *Some of the terminology that mentions "cleaner fish" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…雌雄が産卵前にディスプレーや営巣をし,雄が卵を守るなど,いろいろの習性を発達させている種も多い。また,大きな魚などの外部寄生虫をおもな餌とする掃除魚cleaner fishとして知られる種類も含まれる。また,この類は夜眠る習性をもつことも有名で,水族館でも昼夜を逆転させた水槽を用意し,キュウセン(イラスト)などが砂に潜って寝るようすが観察できるようにしているところもある。… ※「cleaner fish」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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