Deep sea MYSTERY: Researchers entered ‘alien world’ – what they found left them STUNNED

“Survival here means making the most of every last glimmer.”

The researchers then stumble across the barreleye fish, also known as the spook fish due to its bizarre facial features. 

Found in waters between 400 and 1,000 metres deep, it was the first time anyone has managed to get quite as close.

Sir David, 92, continued: “This is the barreleye – a fish with a transparent head. 

“It is filled with jelly so it can look up through its skull.