A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Ants have tiny magnetic compasses in their antennae which help them navigate.
9
Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
There's a lizard known as the 'Jesus Lizard' that can run across water.
11
Female kangaroos have three vaginas.
2