An octopus' coloration depends upon its surroundings. An octopus possesses the ability to alter its coloration depending on its immediate environment. This defensive technique protects the animal from predators and entices prey to come close to the animal.
In addition to surroundings, the color of an octopus alters if the creature is threatened and engaged in defending itself. As a means of more fully protecting itself from a predator, an octopus is also capable of altering the actual texture of its skin.
An octopus is a mollusc with two eyes and four pairs of arms. An octopus lacks a skeletal system.