Any fish of the family Poeciliiidae, small usually brightly-colored viviparous surface-feeding fishes of fresh or brackish warm waters, often used in mosquito control.(noun)
Gnu Collaboartive International Dictionary of English: licensed under The Code Project Open License (CPOL)
Use "live-bearer" in a sentence
"A live-bearer, it is closely related to the southern platyfish or "platy" (X. maculatus) and can interbreed with it."