topminnow

Noun topminnow has 2 senses

• topminnow(n = noun.animal) live-bearer, poeciliid, poeciliid fish - small usually brightly-colored viviparous surface-feeding fishes of fresh or brackish warm waters; often used in mosquito control;
is a kind of cypriniform fish
is a member of family poeciliidae, poeciliidae
has particulars: gambusia affinis, mosquitofish, platy, platypoecilus maculatus, mollie, molly

• topminnow(n = noun.animal) helleri, swordtail, xyphophorus helleri - freshwater fish of Central America having a long swordlike tail; popular aquarium fish;
is a kind of cyprinodont
is a member of genus xyphophorus, xyphophorus