Any of numerous small fishes of the family Cyprinodontidae, including the guppy and mosquito fish, inhabiting chiefly fresh and brackish waters in warm regions.

• 鳉鱼属于鳉科的许多种小型鱼，包括虹鳉和蚊鱼，主要栖居在温暖地带的淡水和咸水中