Ventral fins Meaning, Definition & Usage

  1. noun either of a pair of fins attached to the pelvic girdle in fishes that help control the direction of movement; correspond to hind limbs of a land vertebrate
    ventral fin; pelvic fin.

WordNet


Definitions
  1. (Zoöl.), the posterior pair of fins of a fish. They are often situated beneath the belly, but sometimes beneath the throat.

Webster 1913