Octopuses burn more calories changing color than you use on a 25-minute run

Close up photo of a ruby octopus.

For octopuses, changing color burns about as many calories as a human on a 30 minute jog pound for pound, new research suggests.

Octopuses are masters of disguise, changing color at the drop of a hat to startle predators and hide from prey. But the energetic cost of this shade shifting has remained a mystery.