Blue zoanthids are one of the rarest color morphs of zoanthids to find. A true blue in any coral is quite rare but even more so in zoanthids. These blue colossus zoas have the sweatest blue iridescent color you won’t find in any other zoa. In order to really appreciate blue zoanthids you need white light on your reef tank. The strong blue leds will mask the blue zoanthid color and get washed out.