Answer:

pelagic

Answer	Crossword Clue
PELAGIC	Of the oceans
PELAGIC	Oceanic.
PELAGIC	Pertaining to the ocean.

PELAGIC	Pertaining to the seas.
PELAGIC	Of the open sea
PELAGIC	Living in the open sea
PELAGIC	Pertaining to the open seas
PELAGIC	Of the ocean

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.