Small usually brightly-coloured viviparous surface-feeding fishes of fresh or brackish warm waters; often used in mosquito control - poeciliid fish, poeciliid, live-bearer
Freshwater fish of Central America having a long swordlike tail; popular aquarium fish - swordtail, helleri, Xyphophorus helleri
Derived forms: topminnows
Type of: cypriniform fish, cyprinodont
Part of: family Poeciliidae, genus Xyphophorus, Poeciliidae, Xyphophorus