A Dolphin's Fin

This page is the CodyCross answer for the clue below from Greece, Group 676, Puzzle 4 (Irene Papas).

Question is: A Dolphin's Fin

and the answer is: FLIPPER

Word Meaning:

FLIPPER — In marine mammals such as whales (or other aquatic animals such as sea turtles), a wide, flat limb adapted for swimming.

Definitions from Wiktionary.