Aquarium Fish With Elongated Lower Fin

This page is the CodyCross answer for the clue below from Culinary Arts, Group 134, Puzzle 4 (Sandwiches).

Question is: Aquarium Fish With Elongated Lower Fin

and the answer is: SWORDTAIL

Word Meaning:

SWORDTAIL — One of many species of freshwater fish, in genus Xiphophorus, others of which are called platyfish.

Definitions from Wiktionary.