Researchers have found 16 species of “ultra-black” fish in the depths of the ocean. The darkest fish reflected between 0.044% and 0.051% of light. Normal black paper reflects 10% of light or 200x more than these fish which use their blackness as camouflage. – WTF Fun Facts
Source: Meet the ‘ultra-black’ fish of the ocean’s depths (nbcnews.com)