A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
The seahorse is the only fish to have a neck.
12
When Koko, the gorilla famous for knowing sign language, was asked where gorillas go after death, she responded by signing “Comfortable hole, bye.”
23
Lobsters have blue blood.
476
Some lizards, in which the tail is a major storage organ for accumulating reserves, will return to a dropped tail after the threat has passed, and will eat it to recover part of the sacrificed supplies.
13