Scientists film UK undersea mountain off Scottish coast
4 August 2014 Last updated at 14:24 BST
Scientists have sent a remotely operated vehicle to film one of the UK's three undersea mountains, known as seamounts.
The Hebrides Terrace Seamount, off the west coast of Scotland, is higher than Ben Nevis, but its peak is 1,000m beneath the surface.
Science reporter Victoria Gill reports.