Enter a clue or pattern or both:
The Clue
Fish used in genetic research (9 letter answer)
The Answer
SWORDTAIL
Tags
Notes
The answer SWORDTAIL is so rare that it appears less than once every 2500 puzzles.
Definition
SWORDTAIL as a noun:
1. (swordtail, helleri, topminnow, Xyphophorus helleri) = freshwater fish of Central America having a long swordlike tail; popular aquarium fish