Fin - Fin

Japanese: ひれ(鰭) - ひれ

A locomotor organ found in many aquatic vertebrates, including fish. It is a flat structure that protrudes from the body wall and functions as both an oar and a rudder. Fins are divided into paired fins that grow on the sides of the body, such as the pectoral and pelvic fins, and unpaired fins that grow along the midline, such as the dorsal, anal, and caudal fins. The pectoral and pelvic fins are homologous to the forelimbs and hind limbs of terrestrial vertebrates. The fins of bony fish have a pinniped bone at the base, from which fin rays extend radially or parallel to support the membranous part of the fin. The adipose fin found in sweetfish and salmon is a fin that does not have these supports.

Source : Heibonsha Encyclopedia About MyPedia Information

Japanese:

魚類をはじめ多くの水生脊椎動物にみられる運動器官。体壁から突出する扁平な構造で，オールと舵(かじ)の両方の役割を果たす。胸びれ，腹びれなどのように体側に対をなして生じる対鰭(ついき)と，背びれ，しりびれ，尾びれなどのように正中線に沿って生じる不対鰭に分けられ，胸びれと腹びれは陸上脊椎動物の前肢・後肢と相同。硬骨魚類のひれでは基部に担鰭骨があり，それから鰭条が放射状または並行に出てひれの膜状部を支持する。アユやサケの仲間に見られる脂(あぶら)びれはこれら支持物を備えないひれのこと。

出典　株式会社平凡社百科事典マイペディアについて　情報

<<: Scarf - Fin

>>: Karl Birnbaum