Sheep, goats, octopuses, and toads have rectangular pupils.
7
The reindeer is the only mammal that can see UV light.
17
The Lion's Mane Jellyfish is the largest jellyfish in the world. They have been swimming in arctic waters since before the dinosaurs (over 650 million years ago).
12
When cats are happy, they may squeeze their eyes shut.
10
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
Cats and dogs can hear ultrasound.
350