I think the picture does not give a lot of features but does give information. Using my hand as a go by (my hand would be close to the length of an average man or male teen), the mantle (body, measured from behind the eyes to the tip) is about 5 inches. The arms are short and color brown/green and the eyes have limited to no stalk. The only well known Caribbean that would fit would be O. vulgaris. This is one of my favorite species BUT this is a full adult and will not live long and I would sadly pass on acquiring it.