You are looking into the eye of a Caribbean reef octopus. Although they look mysterious, they are one of the more commonly seen octopus and we know quite a lot about them. Caribbean reef octopus are generally seen at night. I took this photograph during the day; however, the octopus is in the protection of its den. It was not out moving around. I was only able to identify what species of octopus it was by the eye. The Caribbean reef octopus are known for the dark ring around their eye. The rest of its body varies drastically in color, as the octopus is capable of changing its body color and texture. The primary colors it displays are an electric blue-green, brown, red, and white (seen in image). It is amazing to watch the octopus change colors at the blink of an eye.