A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
6
Giant Anteaters' front legs look like a panda.
48
Dogs have been man's pet for over 14,000 years.
224
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
Two dogs were among the Titanic survivors.
262
Sharks, like other fish, have their reproductive organs in their chests.
248
The oldest creature ever found was Ming the clam at an admirable 507 years old.
16