Uma-uo (Dragon's Offspring) - Uma-uo

...A general term for marine fish in the genus Hippocampus, family Syngnathidae, order Syngnathidae, or one of these. The genus Hippocampus means a monster with a horse's neck and a dolphin's body, and is also called sea horse in English, and in Japan it is called Uma-uo (Kochi) or Umiuma (Wakayama). This species has a head bent at a right angle, giving it a shape reminiscent of a horse.

*Some of the terminology explanations that mention "Umauo (child of the dragon)" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…ヨウジウオ目ヨウジウオ科タツノオトシゴ属の海産魚の総称，またはそのうちの1種を指す。属名のHippocampusは首が馬，体がイルカの怪獣の意味で，英語でもsea horseといい，日本でもウマウオ(高知)，ウミウマ(和歌山)などと呼ばれる。この仲間は頭部が直角に曲がり，馬を思わせる形態をもつ。…

※「ウマウオ（竜の落し子）」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