It is a canyon that is under the sea.
A canyon is a place where the ground has eroded into a deep ravine or gully - like the Grand Canyon. The sea is the same as the ocean.
Undersea volcanoes that erupt.
Undersea Fleet was created in 1956.
Undersea Quest was created in 1954.
Undersea Trilogy was created in 1992.
Undersea City was created in 1958.
The duration of Undersea Kingdom is 3.77 hours.
Undersea Trilogy has 501 pages.
Some islands may be built by undersea volcanoes.
Naval Undersea Museum was created in 1995.
Undersea Kingdom was created on 1936-05-30.
undersea mountains
Jules' Undersea Lodge was created in 1986.