Synonyms of deep-sea

deep-sea

adjective

ˈdēp-ˈsē 

as in oceanic

of, relating to, or occurring in the open sea

chartered a boat to do some deep-sea fishing

Synonyms & Similar Words

• oceanic
• marine
• pelagic
• blue-water
• deepwater
• maritime
• nautical

Antonyms & Near Antonyms

• littoral

Example Sentences

Recent Examples of deep-sea

Scientists have found an active coral community that may belong to a deep-sea coral reef system presumed to be dead decades ago, according to new research. — Julia Jacobo, ABC News, 23 July 2026

The government of American Samoa, which has banned deep-sea mining in local waters, did not immediately return a message seeking comment. — Dánica Coto, Chicago Tribune, 17 July 2026

But this place is all about fun on the water, and the Taj can arrange kayaking through the mangroves at night to see the bioluminescence, scuba diving, deep-sea fishing, and forays to see turtles nesting. — Condé Nast, Condé Nast Traveler, 15 July 2026

The Minderoo Foundation, named after the cattle and sheep ranch where Forrest grew up, supports everything from deep-sea preservation to the performing arts. — Eleanor Pringle, Fortune, 8 July 2026