When dragonflies mate, their tails form a love heart.
22
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
When a drone bee mates with a queen, its ejaculation is so powerful that it can even be heard by the human ear.
5
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492