I'm hoping to find a couple of snakes and any other aquatic creatures.

我希望能找到一些蛇和其他水生生物。

Other aquatic creatures  of the time like the plesiosaurs and mosasaurs are technically not dinosaurs.

当时的其他水生生物，如蛇颈龙和沧龙，严格来说并不是恐龙。

Tiny fossilized skeletons of aquatic creatures called diatoms are swept into the wind and carried westward where they rain down on South America.

被称为硅藻的水生生物的微小骨骼化石被风吹走并向西飘落在南美洲。

But it's been missing, presumed extinct, for more than a decade. And it's just one of thousands of aquatic creatures that are facing extinction, but have slipped under the radar.

但这种鱼消失了十多年，一度被认为已经灭绝。它只是成千上万个面临灭绝，却未被察觉的水生生物之一。