ventral fin

American  

noun

1. pelvic fin.

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ventral fin British  

noun

1. another name for pelvic fin

2. any unpaired median fin situated on the undersurface of fishes and some other aquatic vertebrates

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Etymology

Origin of ventral fin

First recorded in 1745–55

Example Sentences

See Examples For:

ventral fin

All Chinook must be adipose and/or ventral fin clipped to be retained.

From Seattle Times ● Jul. 29, 2012

Do not cut off the ventral fin on the side which is to be displayed.

From Home Taxidermy for Pleasure and Profit A Guide for Those Who Wish to Prepare and Mount Animals, Birds, Fish, Reptiles, etc., for Home, Den, or Office Decoration by Albert B. Farnham

Destitute of the ventral fin, as the eels.

From Webster's Unabridged Dictionary by Noah Webster

The gills flat, unarmed; pectoral fin subacute, triangular; ventral fin triangular, supported by a very strong first ray; dorsal and anal fins rounded.

From Narrative of a Survey of the Intertropical and Western Coasts of Australia Performed between the years 1818 and 1822 — Volume 2 by Phillip Parker King

A simulacrum of a ventral fin increases the resemblance.

From Social Life in the Insect World by Bernard Miall