Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
Some older/less efficient worker termites will develop 'backpacks' of toxic chemicals that explode when the termite is threatened. They are essentially used as suicide bombers when the colony is being attacked.
8
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492