Seaweed is a nursery for all these large pelagic fish.

对所有这些大型中上层鱼类来说，海藻它们的温床。

But pelagic fishing only runs 6 months a year.

但，一年中能出海的机会只有半年。

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

年幼的极地鲟鱼海洋物，也就说他们活在或者接近海平面。

Most free-swimming sea creatures are pelagic.

大多数自由移动的海洋物都海面物。

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

但高阶的鲨鱼习惯于长时间在没有障碍物的环境下，能够随心所欲地改变方。

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，洄的大洋性鱼类，比如金枪鱼会吸收有害金属。

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，它不我们称作远洋物种的深海物种或外海物种。

" Offshore" killer whales, up to 6.6 metres long, patrol distant waters in pods of 100 to 200 individuals, hunting pelagic fishes like sharks.

“远洋鲸”长达6.6米，以100至200头的群体在遥远水域巡逻，捕食鲨鱼等中上层鱼类。