A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
6
It has been scientifically proven that stroking a cat can lower one's blood pressure!
456
The Savannah is the largest domestic cat breed. It resembles a small leopard and behaves like a dog. They can grow up to 40 lbs, have an eight foot vertical jump, and can be trained to walk on a leash and play fetch.
17
Cats and dogs can hear ultrasound.
350
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
The octopus does not have a blind spot.
273