abbreviate-heterocercal fin

Context: Ichthyology, Physiology.

A caudal fin in which the vertebral column is deflected dorsad in the caudal base but not into the dorsal lobe of the caudal fin itself.

Reference

Miller, Robert Rush. 2006. "Freshwater Fishes of Mexico". University of Chicago Press, Chicago. 1-524 - (ffm01245)