Ubauo (old woman fish) - Ubauo (English spelling) clingfish

Japanese: ウバウオ(姥魚) - ウバウオ（英語表記）clingfish

A general term for fish in the Gobiesocidae family of the order Gobiesocidae. Most Gobiesocidae are small fish less than 10 cm long, and live in shallow coastal waters and tide pools. There are few of them, and they are hard to see because they hide under stones or among seaweed. Their bodies have no scales, and they attach to objects using suckers formed by the combination of their left and right pelvic fins and folds of skin. These suckers are larger and have stronger adhesive power than those of gobies. They are distributed from temperate to tropical regions around the world, and about 100 species are known. Some of them are large, reaching a body length of 30 cm, some live symbiotically with sea urchins and eat their tube feet, and some live in freshwater away from the sea.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

ウバウオ目ウバウオ科Gobiesocidaeの魚の総称。ウバウオの仲間はほとんどが体長10cm以下の小魚で，海岸の浅瀬や潮だまりに生息する。数も少なく，石の下や海藻の間に隠れているので人目にはつきにくい。体にはうろこがなく，左右の腹びれと皮膚のひだが合わさってできた吸盤で物に吸いつく。この吸盤はハゼ類のものより大きく吸着力が強い。世界中の温帯から熱帯にかけて分布し100種ほどが知られる。中には体長30cmに達する大型種，ウニと共生してその管足を食べる種，海を離れた淡水にすむ種もある。

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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