homocercal fin

/ˌhoʊməˈsʌrkəl fɪn/

Definitions of homocercal fin

1. noun

   symmetrical tail fin extending beyond the end of the vertebral column as in most bony fishes
   antonyms:

   heterocercal fin

   a tail fin with unequal lobes in which the vertebral column turns upward into the larger lobe as in sharks

   type of:

   caudal fin, tail fin

   the tail of fishes and some other aquatic vertebrates