This is the Franko Hawaii Fish ID Card with Dive Map Features: waterproof hole for lanyard top dive and snorkel sites fish identification guide Approximately 5.5" x 8.5" Side One has a shaded relief mini-map of with top dive and snorkel sites located. Side Two is a fish identification guide with 75 species of Hawaiian reef creatures beautifully illustrated. This convenient, waterproof reference is laminated with hole for lanyard. 5.5" x 8.5"