The Chinese astronomical mansion 'Tail' (one of the 28 mansions), known as 'Bi' (尾) in East Asian star naming.
二十八宿の一つ、尾（び）は東の空に位置する星群の呼称だ。
The Tail (Bi), one of the 28 mansions, is the name of a star group located in the eastern sky.
A counter for fish, shrimp, and similar small animals (尾, read 'び' in counting). Used like '— tails' in English.
鯛を三尾（さんび）買ったので、夕飯は刺身にしよう。
I bought three sea bream (sanbi), so we'll have sashimi for dinner.
お弁当に海老が五尾（ごび）入っていた。
There were five shrimp (gobi) in the bento.