Disguise on Demand

An octopus can change color and texture in under a second, melting into rock, sand, or coral. It does not pick one fixed disguise — it reads the surroundings and matches them on the spot, then shifts again as it moves.

The strange part: octopuses are colorblind, with just one type of light sensor in the eye. Somehow they still tune their camouflage to the colors around them, a problem scientists are still working out. Choosing and adjusting a disguise this fast is itself a kind of fast, body-wide decision-making.