description=Octopi are marvelously advanced invertebrates. They have complex brains and eyes that resemble our own. They can alter their shape and color to match their backgrounds, and they often expel a cloud of ÅinkÅ to mask their escape from a potential enemy. Here, a reef octopus (Octopus briareus) hunts at night.ìÄìÄLocation: Roatan, Caribbean. ìÄ
