ventral fin

noun

1. pelvic fin.

ventral fin

noun

1. another name for pelvic fin
2. any unpaired median fin situated on the undersurface of fishes and some other aquatic vertebrates

Word History and Origins

Origin of ventral fin¹

First recorded in 1745–55

Example Sentences

As a result of poor returns of steelhead to the upper Columbia River, this fishery has been restricted to the harvest of Ringold Springs Hatchery origin steelhead as identified by both an adipose and right ventral fin clip.

From Seattle Times

Released steelhead included 32 adipose only, 17 unclipped, and 5 adipose-right ventral fin clipped steelhead.

From Seattle Times

Steelhead released from the Ringold facility have both an adipose and right ventral fin clip. 

From Seattle Times

From September 10-14, Chinook must have an adipose or left ventral fin clip to be retained. 

From Seattle Times

The adipose or left ventral fin clip restriction for Sun.

From Seattle Times