Meet the tongue-eating isopod, Cymothoa exigua. This marine parasite feasts on a fish's tongue and then becomes its tongue.
Kelly, the Gull-Baiting Dolphin
A dolphin named Kelly has shown astounding signs of intelligence.
How Ultra-Black Fish Disappear in the Deepest Seas
Normal black paper reflects 10% of light or 200x more than these fish which use their blackness as camouflage.