Size of lionfish depends on the species. Smallest species are only 2 inches long, while largest can reach 16 inches in length. On average, lionfish have 1 to 2 pounds in weight and can reach 13 inches in length. Lionfish are famous by their beautifully colored bodies, covered with red, white, orange, black or brown stripes (it depends on the species). Stripes are arranged in zebra-like pattern. Lionfish have feathery pectoral fins that are used to attract smaller prey. On the other hand, same features keep the predators on the safe distance. Lionfish has more than thirteen (up to 18) venomous spines on the back side of the body. Venom is used only for self-defense (lionfish does not hunt using these spikes).