a divice that supplies air to underwater swimmers
Whales breathe in and out of their blowhole. They are unable to breathe through their mouth because the trachea is not attached to the throat.
the name of the muscle that is attached to your ribs is called a Diaphragm,it helps your lungs to breathe.
poiuydsa
a mid ocean ringe
ocean ridge
The chain of undersea mountains is called a mid-ocean ridge. It is formed by the movement of tectonic plates and is characterized by volcanic activity and the creation of new oceanic crust.
The dolphin needs to be in Atlantica. If not, something's wrong. The dolphin is in Undersea Valley I believe it's called, and the Undersea Gorge.
u-boats, "undersea boats"
An undersea volcanic formation that doesn't rise 1000 meters above the surrounding sea floor is called a seamount.
Chunnel (also called channel tunnel)
Many, they are called volcanic undersea mounts.