Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
The oldest recorded elephant lived for 82 years.
213
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
When cats are happy, they may squeeze their eyes shut.
10