But for seamounts worldwide, this wealth is threatened. More and more, deep-sea fishing trawlers drag nets weighted with heavy chains across seamounts to catch schools of fish that congregate ...

and tons of sea creatures clinging to their sides. Unlike mountains on land that dare climbers and hikers to brave their peaks, underwater mountains, called seamounts, are vastly underexplored.

A Greenpeace expedition to survey seamounts and other deep sea habitats has set off this week. With two specialist marine scientists on board, Greenpeace is aiming to use remotely operated deep ...