The Basenji dog is the only dog that is not able to bark.
4
In 1949, an official boxing match between a bear and a man was held. The bear won.
41
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 koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
6
There's a rare breed of pig that looks like a sheep.
14
Domestic pigs average a top speed of about 11 miles per hour.
182