Noun: topminnow 'tóp,mi-now
- Small usually brightly-coloured viviparous surface-feeding fishes of fresh or brackish warm waters; often used in mosquito control
"Guppies are a popular topminnow in home aquariums";
- poeciliid fish, poeciliid, live-bearer
- Freshwater fish of Central America having a long swordlike tail; popular aquarium fish
"Male topminnows use their elongated tails to attract females";
- swordtail, helleri, Xyphophorus helleri
Derived forms: topminnows
Type of: cypriniform fish, cyprinodont
Part of: family Poeciliidae, genus Xyphophorus, Poeciliidae, Xyphophorus
Encyclopedia: Topminnow