soft-finned definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
Zool. having fins with soft rays instead of hard spines
soft-finned definition by American Heritage Dictionary
Having fins supported by flexible cartilaginous rays; not spiny-finned. Used of bony fishes.