Most free-swimming sea creatures are pelagic.

大多数自由移动的海洋生物都是海面生物。

But pelagic fishing only runs 6 months a year.

但是，一年中能出海的机会有年。

Seaweed is a nursery for all these large pelagic fish.

对所有这些大型中上层来说，海藻是它们的温床。

Young polar cod are pelagic, meaning they live at or near the surface.

年幼的极是海洋生物，也就是说他们生活在或者接近海平面。

But pelagic sharks are used to being able to swim long distances without obstructions, changing directions only as they please.

但是高阶的鲨习惯于长时间在没有障碍物的环境下，能够随心所欲改变方向游泳。

And we haven't even gotten into the whole mercury thing yet, where migratory Pelagic fish like tuna absorb toxic metals.

我们还没说到有害物质呢，洄游的大洋性，比如金枪会吸收有害金属。

So, as far as we know, it was not a deep water kind of species or an open ocean, we call pelagic species.

所以就我们所知，它不是我们称作远洋物种的深海物种或是外海物种。