Red All Over...Sometimes
The normal color of a red octopus (Octopus rubescens) is red or reddish brown, but like other octopuses it can change quickly — in a fraction of a second — to yellow, brown, white, red or a variety of mottled colors. To communicate or court, an octopus might contrast with its surroundings. To hide, it will camouflage itself. It can also alter skin texture to match sand or a rocky surface.
Although it has excellent eyesight, a red octopus uses touch and smell to find food — thousands of chemical receptors and millions of texture receptors line the rims of its suckers. It scours the sandy seafloor to flush out small prey, or crawls in and out of rocky areas to hunt crabs and shrimp.