单词thornback
na.: 【鱼】鯆鱼网络: 刺鱼;背刺;后棘
复数:thornbacks
The month-old thornback ray is just 12 centimetres long and is one of a dozen hatched from eggs known as "mermaid"s purses" .
这个只有1个月大的团扇鳐仅12厘米长,是从一群被称为“美人鱼钱包”的卵中孵出的十几条中的一条。