The waterproof identification cards aren't the best. One or two of the fish shown are wrongly named, and names are occasionally mis-spelled. Many of the Maldives fish go through a huge range of colour changes as they mature, meaning that a single image of an adult often won't help in identification. Tip - Try snorkelling at 6.00 am! The water will be at its clearest then. During the day, the sun encourages the growth of algea suspended in the water, and flash photos can look as if it's snowing. Also, at that time of day, you just might find some fish still around that come to the surface at night, but go deep during daylight hours.