原图如下 外来物种不宜放生。应为
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/7aec54e736d12f2e8531a4d048c2d5628535684d?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
雀鳝科 Lepisosteidae 大雀鳝属 Atractosteus(骨雀鳝属) 鱼类
下图为 大雀鳝 Atractosteus spatula (305 cm) ,俗称 鳄雀鳝、福鳄 、火箭
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/ca1349540923dd540d40d2d8d609b3de9c82484a?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/95eef01f3a292df5b0fed9a5bb315c6034a87344?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
福鳄的身体覆盖著一层菱形釉层的硬磷,像是穿着钢盔铁甲。雌鱼比雄鱼略大,是现存雀鳝目中体型最大的一种。鱼身呈长筒形,密布青灰色菱形鳞片,带有暗黑色斑纹,吻部前突,上下颚密布利齿,形似鳄口,因此得名。跟它们的大部分近亲不同,福鳄能呼吸空气,并且可以在离开水的情况下存活长达两小时。