fin fold

fin fold

[′fin ‚fōld]
(embryology)
A median integumentary fold extending along the body of a fish embryo which gives rise to the dorsal, caudal, and anal fins.
References in periodicals archive ?
There are two blotches present on the distal margin of the anal fin fold and two blotches on the ventral margin of the body located at myomeres 16-19 and at myomeres 27-36.
The dorsal fin fold begins behind the brain area (Fig.