Night feeders leave the cave each evening. 它们每天晚上出洞觅食
they are most vulnerable at the scheduled time of departure. 它们在出发阶段最容易遭受攻击
For these fish the caves are a night time retreat, 对于这些鱼来说 洞穴是理想的过夜场所
but they're not the only commuters in here. 但它们并非这里的唯一住客
After a day feeding in the open water 经过一天开放水域的觅食之后
vast shoals of demoiselle fish return to the caves, 大群雀鲷返回到洞窟中
so most sea caves are created by the mechanical pounding of the waves. 所以大部分海洋洞窟 是在海浪的机械冲击下形成的
The rocky outcrops of New Zealand's Poor Knight Islands are riddled with sea caves 新西兰坡·骑士岛的 岩礁下布满了海蚀洞
The Maya understood the importance of the cenotes, 玛雅人知道沼穴的重要性
but they could never have known that these flooded passageways were actually the beginning of subterranean rivers, 但他们从不知道这些水下通道 其实是地下河的入口