Out there with the camera are hydraulics ... Seamounts generally form when volcanic mountains rise up from the seafloor but fail to reach the surface (those that break the surface become islands).

The Salas y Gómez and Nazca Ridges are deep-sea mountain ranges with multiple volcanoes that extend nearly 1,870 miles and are home to numerous species. Many of these are important fishery ...

Under-sea mountains are key locations for predators -- with 41 times more sharks than the open ocean, new research shows.

With a richly diverse natural landscape—from the vertiginous mountain peaks of the Caucasus to the balmy rainforests of the Black Sea-fronted Adjara region—the country of Georgia offers ...