Deep sea mystery: Scientists discover 'ultra-black' fish able to absorb '99.5%' of light'

In such an oceanic environment, bioluminescence from most deep-sea creatures is the only light source.

Bioluminescent glows are used to attract mates, distract predators, lure prey and expose nearby animals.

Dr Karen Osborn, a Smithsonian National Museum zoologist and co-author of the new study, first became interested in these fish skin when she tried to photograph some striking blackest fish.

Despite sophisticated equipment, she said, she could not capture any detail in the images.

source: express.co.uk