Lobsters have blue blood.
476
Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
Bats sleep 18-20 hours per day.
5
Drivers kill more deer than hunters do.
660
The octopus does not have a blind spot.
273
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Sharks have been on the planet longer than trees.
14