adjective
- existing, occurring, or used beneath the surface of the sea
Examples
- The undersea cable carries internet data across the Atlantic Ocean.
- Marine biologists study undersea life in the deep ocean trenches.
- The undersea earthquake triggered a devastating tsunami.
- Undersea exploration requires specialized diving equipment.
- The documentary showed amazing undersea creatures living near volcanic vents.
- Undersea mining operations extract minerals from the ocean floor.