A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
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There's a young hippo and a 130+ year old tortoise in a Kenyan wildlife preserve who are best friends and they even sleep and play together.
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The oldest creature ever found was Ming the clam at an admirable 507 years old.
16
The world’s largest frog, the Goliath frog, can grow over 13 inches in length and can jump up to 10 feet in a single bound.
8
There's a phone app called RoboRoach that allows you to remotely control a cockroach through a chip that you to manually implant into the unwitting critter.
10
Some lizards, in which the tail is a major storage organ for accumulating reserves, will return to a dropped tail after the threat has passed, and will eat it to recover part of the sacrificed supplies.
13
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
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