Any of numerous venomous aquatic viviparous snakes having a fin-like tail ; of warm littoral seas ; feed on fish which they immobilize with quick-acting venom .
多种有鳍形尾巴的水栖胎生毒蛇;产于温暖的海滨;它们以鱼为食,靠迅速见效的毒液致使猎物固定不动。
Worms and insects : oviparous , viviparous , aquatic .
虫:卵生、化生、湿生。
Viviparous bringing forth living ( active , free-swimming ) young , rather than laying eggs ; producing live young from within the body of the parent female .
生出活的(活跃的,自由游泳的)幼鱼,而不是产卵;产生来自母鱼身体之内的活的幼鱼。
Ichthyosaurs and other contemporary viviparous species , by contrast , gave birth to multiple offspring .
相反,鱼龙和其他同时代的胎生动物会一次生出多个后代。
Any of various small viviparous new world fishes of the family poeciliidae , of fresh or brackish waters .
浮鲦产于新大陆的一种杂色鱼科小型胎生鱼,生活在淡水或半淡水中。
These lizards are viviparous , giving birth to an average of six live young in autumn .