Video – Deepest ever Living Fish
Marine scientists filming in one of the world's deepest ocean trenches have found groups of highly sociable fish swarming nearly five miles (7700 metres) beneath the surface. When the international team recovered their high definition cameras from record-breaking depths in the
There are very few places in the world deep enough to fit into this category, and most lie in very narrow trenches around the
Professor Priede, director of Oceanlab, said: "There is the question of how do animals live at all at these kinds of depths.
"There are three problems: the first is food supply, which is very remote and has to come from 8km (5 miles) above.
"There is very high pressure - they have to have all sorts of physiological modifications, mainly at the molecular level.
"And the third problem is that these deep trenches are in effect small islands in the wide abyss and there is a question of whether these trenches are big enough to support thriving endemic populations."
But this species appears to have overcome these issues, added Professor Priede.