In the Caribbean there are oysters that can climb trees. Polar bears are left-handed. The average person swallows three spiders annually. Armadillos have four babies at a time and they are always all the same sex. Armadillos are the only animal besides humans that can get leprosy.
Sharks apparently are the only animals that never get sick.
As far as is known, they are immune to every known disease including cancer. At 188 decibels, the whistle of the blue whale is the loudest sound produced by any animal. You're more likely to be a target for mosquitoes if you consume bananas. The poison-arrow frog has enough poison to kill about 2,200 people. The distance between an alligator's eyes, in inches, is directly proportional to the length of the alligator, in feet.