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
Alligators can live up to 100 years.
337
There is a sea snail that wears a suit of iron plated armor. It is the only known animal to use iron sulphide as skeletal material.
9
A banana slug can be 6-8 inches and their erect penis can be just as long. Also, their penises emerge from their heads. After sex, banana slugs eat each others penises.
17
Cats recognise the voice of their owner, but never evolved to care.
22
When cats are happy, they may squeeze their eyes shut.
10
The reindeer is the only mammal that can see UV light.
17