adipose fin
A small, fleshy fin without fin rays, located on the back between the dorsal fin and the tail, found in some fish such as salmonids and catfish. Technical ichthyological term.
Salmonids have an adipose fin behind the dorsal fin.
Research is conducted in which the adipose fin is clipped as a mark.
Standard kanji spelling for this ichthyological term.
Mixed kanji-kana spelling; common in general-audience texts.
A compound of 脂 and 鰭, named for the small, soft fin lacking fin rays that resembles a lump of fatty tissue.