Sea floor spreading causes several chains of underwater mountains. They are sometimes called seamounts. They are also called mid ocean ridges.
ocean ridge
The mid Atlantic ridge is an underwater mountain chain.
massif.add possibly a seamount chain, but these are usually quite extended.
Mountains and hills underwater can be bigger than the mountains and hills on land.
The Mid-Ocean Ridge is the chain of underwater mountains that extends into all of Earth's oceans. It is the longest mountain range on Earth, winding around the planet like the seam on a baseball.
Underwater volcanoes and mountains can form at both convergent and divergent boundaries.
The underwater mountain chain is called the mid-ocean ridge
on moutiansislandsand underwater
Volcanoes
See "Mountain chain" for answer
a underwater mountain
The Transantarctic Mountains are the southernmost mountains in the world