This Ocean Creature Makes Its Own Invisibility Cloak

In the open seas, the only way to hide is to disguise yourself as water. Cystisoma have mostly transparent bodies that reduce their visibility to predators. But, they also rely on an anti-reflective coating to make them even more difficult to see. Life under the sea can be nasty, brutish, and short if you don't have an effective form of camouflage. The cuttlefish's skin, for instance, holds some ten million color cells, allowing it to impersonate a chunk of a coral, a clump of algae, or a patch of sand.