fin organ of locomotion and balance in fishes and some other aquatic animals
fish any of various mostly cold-blooded aquatic vertebrates usually having scales and breathing through gills; "the shark is a large fish"; "in the living room there was a tank of colorful fish"
heterocercal fin a tail fin with unequal lobes in which the vertebral column turns upward into the larger lobe as in sharks
tail fin -
one of a pair of decorations projecting above the rear fenders of an automobile
auto,
automobile,
motorcar,
car,
machine a motor vehicle with four wheels; usually propelled by an internal combustion engine; "he needs a car to get to work"
tail fin -
a stabilizer that is part of the vertical tail structure of an airplane
