Seabed

The boat was brought up from the seabed by the Algerian authorities.

Polymetallic nodules are potato-sized lumps found in the seabed that contain metals used in battery manufacturing and high-tech industries.

Diverse life forms live on the seabed.

A scientist says fossils she collected from an ancient seabed in the mountains of northwestern Canada may be the earliest evidence of animal life on Earth ever discovered.

The report also said mining for polymetallic nodules, potato-sized lumps found in the seabed that contain metals used in battery manufacturing and high-tech industries, would cause “essentially irreversible damage” to the region, including Kiribati the Cook Islands, Nauru, Tonga, Papua New Guinea and Tuvalu.

Divers searched the seabed metre by metre.

Near-synonym: Davy Jones's locker