pelagic

许多海洋生物生活在远离海岸的广阔海域中。

Many marine creatures inhabit the vast ___pelagic waters far from the coast.

许多远洋鱼类,如金枪鱼,一生都在开阔海域中生活。

Many ___pelagic fish, like tuna, spend their entire lives in the open ocean.

考察队研究了来自深海海床的远洋沉积物。

The expedition studied ___pelagic sediments from the deep seafloor.