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

The tests demonstrate the underlying sensing and healing mechanisms, not a finished skin ready to spend years clinging to a deep-sea robot. — New Atlas, 4 Aug. 2026

Guest adventures can be tailored to nighttime fishing, wintertime Wahoo trolling, or full-moon deep-sea excursions. — Kelsey Glennon, Southern Living, 3 Aug. 2026

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