Octopuses change color to camouflage themselves from predators such as stingrays and eels. Octopuses have even been observed changing color in their sleep. Octopus's color-changing ability is known as ...

Blending in with your surroundings is a crucial (and fascinating) skill in the animal kingdom, which is why many animals can change colors on demand. Chameleons, seahorses, and octopuses can all do it ...