The reindeer is the only mammal that can see UV light.
17
A dork is a whale's penis.
327
There's a rare breed of pig that looks like a sheep.
14
The seahorse is the only fish to have a neck.
12
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492
Cats and dogs can hear ultrasound.
350