Off we pile onto Koh Khai Nok, a small triangular island about the size of a large football pitch comprising a rocky headland and a snow-white beach. One special characteristic of Koh Khai Nok is that it has at least twelve types of exotic tropical fish and they aren't afraid of humans. As a result a lot of people are swimming through them with people taking photos of them.Loaves of bread are handed out to feed the shoals and there's a colourful feeding frenzy every time a piece of bread is thrown in. Many more swim out to a retaining floating rope where the serious coral starts and some even swim further up the island's south coast, marveling at the sub-aquatic life.