noun which may take the genitive case particle 'no', noun
pelagic
Technical term used in marine biology and oceanography to describe organisms or environments of the open ocean, away from the coast or the sea floor.
Pelagic fish have a wider migratory range than coastal fish.
Many pelagic plankton are found in this sea area.
Compound of 外洋 (open ocean) + 性 (nature, -ity). A straightforward Sino-Japanese technical term.