seafloor

2. The solid surface beneath a body of water, studied in geology and oceanography.

Scientists mapped the seafloor to find underwater mountains.

3. The habitat zone where bottom-dwelling creatures such as clams and worms live.

Many strange animals are adapted to life on the deep seafloor.

4. In a figurative sense, the lowest or deepest level of something.

Prices for the old boat sank to the seafloor of the market.