Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
The male seahorse carries babies and 'gives birth' to them instead of the female.
7
A hedgehog's heart beats 300 times a minute on average!
14
A female ferret will die if it goes into heat and cannot find a mate.
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