A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Tigers can see 6 times better at night than humans.
305
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
The head of a jellyfish is called the "Bell."
6
In order to enhance the taste, Japanese macaque wash their food in salt water before they eat. They also make snowballs for fun!
7
A 42-foot sperm whale has about 7 tons of oil in it.
209