Pelvic fin

part of a fish

Pelvic fins or ventral fins are paired fins located on the ventral surface of fish.

Pelvic fin of a Java barb

Structure and function change

Structure change

In actinopterygians, the pelvic fin consists of two bony girdles attached to bony radials. The lepidotrichia are positioned distally from the radials.

Function change

A pelvic fin's function is to provide powered corrective forces.

Development change

Unlike limb development in tetrapods, the pelvic fin bud emerges much later than the pectoral fin.

References change

  1. Shibukawa, Koichi, Dinh Dac Tran, and Loi Xuan Tran. "Phallostethus cuulong, a new species of priapiumfish (Actinopterygii: Atheriniformes: Phallostethidae) from the Vietnamese Mekong." Zootaxa 3363.1 (2012): 45-51.