topminnow
(noun)
noun
1. small usually brightly-colored viviparous surface-feeding fishes of fresh or brackish warm waters; often used in mosquito control
Similar word(s): poeciliid
Definition categories: animal
2. freshwater fish of Central America having a long swordlike tail; popular aquarium fish
Similar word(s): helleri, swordtail
Definition categories: animal, cyprinodont