Planning a trip to the Hawaiian Islands? If so, this I.D. card is a must for underwater identification. This full-color fish identification card allows you to know what local wildlife you are looking at when you see it. Card is waterproof and easily stored in your BCD pocket. This 6 x 9 inch (15 x 23 cm) plastic I.D. card depicts more than 60 Hawaiian reef fish in color drawings, and is hole-punched to secure a lanyard for underwater use.