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

Voyages from Antarctica to deep-sea archaeological sites helped redefine the role of the modern superyacht. — Robb Report, 9 Oct. 2026

The equipment was part of a network of 900 deep-sea instruments that had been anchored off Oregon, Washington State, Alaska, North Carolina, and an area between Greenland and Iceland known as the Irminger Sea. — Eric Niiler, New York Times, 3 Oct. 2026

The refinery was initially planned to be built in Tanzania’s coastal town of Tanga, but Dangote said it was later determined that Lamu had deeper waters, solid ground capable of supporting the heavy equipment, and deep-sea access. — Evelyne Musambi, Fortune, 30 Sep. 2026

For next steps, the researchers plan to scale the technology into larger structures and prove its long-term durability in real marine and deep-sea conditions. — New Atlas, 20 Sep. 2026