ˈ ̷ ̷| ̷ ̷ adjective
Etymology: deep (I) + sea
1. : of, relating to, occurring in, or for use in the deeper parts of the ocean
deep-sea currents
deep-sea fishes
a deep-sea line
2. : acting (as by sailing or fishing) or for use in parts of the oceans far from land
deep-sea fishermen
a deep-sea tug
— sometimes distinguished from coastal, longshore