The octopus are masters of camouflage. They can cause cells under the surface of their skin to alter color. However, it might be that these soft-bodied animals are not just putting on a display of light to confuse predators. Recently, PBS published a mesmerizing video of a sleeping cephalopod that changed its color several times.
The marine biologist Dr. David Scheel’s narration makes it even more entertaining. He’s trying to guess what the octopus— Heidi — was dreaming about.