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
The largest earthworm on record was found in South Africa and measured 22 feet.
151
An alligator can go through 2,000 to 3,000 teeth in a lifetime.
268
The Pistol Shrimp can snap its claws together to create a sound of 218 decibels, louder than as supersonic jet at full speed. It only lasts for 1 millisecond. The snapping action also creates a bubble that is greater than 5000 Kelvin, close to the surface temperature of the sun.
21
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20