including insects, spiders, and crabs, 包括昆虫、蜘蛛和螃蟹
Unlike jellyfish, Anomalocaris can swim with both direction and pace. 与水母不同 奇虾游速快且方向准确
And in the tropical shallows 508 million years ago, 在5.08亿年前的热带浅海中
And its breakthrough adaptation, armor. 它的突破性适应特征就是护甲
they were the very first animals to escape the seafloor and swim. 它们是第一种从海底逃离 并开始游泳的生物
And one group adapted in a way never seen before. 有一群生物以前所未见的方式 适应了这种转变