尾おびれ

noun

caudal fin; tail fin

Refers to the tail fin of a fish. The reading おひれ is sometimes used, but おびれ is standard.

• 金きん魚ぎょの尾おびれが美うつくしい。

  The goldfish's tail fin is beautiful.

• この魚さかなは尾おびれが大おおきい。

  This fish has a large tail fin.