A general term for fish belonging to the Bothidae family of the Pleuronectiformes order, or one of these species. Approximately 30 species live in Japan, and are mostly found in the central and southern parts of the country. Taxonomically, they are more closely related to the Bothidae family than to the Pleuronectidae family. They are named after their rounded overall shape. The pelvic and pectoral fins have branched soft rays, and the lateral line on the eyeless side is not developed. Many species become large larvae around the time of metamorphosis, and in the juvenile stage, the base of the pelvic fin on the left side of the body extends and becomes longer than that on the right side, and the front end of the dorsal fin reaches forward beyond the eye. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
カレイ目ダルマガレイ科Bothidaeに属する魚類の総称,またはそのうちの1種を指す。日本には約30種ほどが生息し,中部以南に多く見られる。分類学的には,カレイ科よりもむしろヒラメ科の近縁に位置する。全体の形態が丸みを帯びているところからこの名がつけられている。腹びれと胸びれに分枝軟条があり,無眼側の側線は発達していない。変態前後に大型の幼生になる種が多く,また,幼期には左体側の腹びれの基底が延長し右側のそれより長くなり,背びれの前端が眼の上よりも前方に達している。
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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