This is not a photograph of a reptile's skin. Can you figure out what it is?
Have you ever seen a snail look so happy? This Achatina fulica, an East African land snail, stretches its head toward a pleasant stream of tap water. You'd think it was washing a long, hard day off its foot.
As far as invertebrates go, you don't get much smarter than the members of the mollusk phylum, which includes octopuses, cuttlefish, and squid. But mollusks apparently didn't think through their evolutionary path very well, developing brains four times over.
For most of us, being devoured by something many times bigger than us would mean a gruesome, agonizing death. But for tiny snails, it's just a minor irritation...and a quick and disgustingly clever way to migrate elsewhere.
A tiny sea snail known as the clusterwink snail has one of the strangest abilities in the animal kingdom. The snail can create a ghostly green light, then use its shell to scatter the light beam all over its shell.