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 ...

A video of an octopus changing colors while it sleeps is raising a lot of questions about the mysterious sea creatures. The footage aired in the new PBS documentary titled "Octopus: Making Contact." ...

Colour change in animals can occur over different timescales and aids communication and camouflage. Direct evidence of the associated energetic costs has been lacking, but now an experimental study of ...