Raja Ampat is famous for its healthy and biodiverse coral reefs, and the picturesque coral garden at Keruo is a perfect example, with a kaleidoscope of colourful corals and bright reef fish darting around the reef. The zooxanthellae, the algae present in the tissues of corals, contain a pigment called chlorophyll which gives the coral not only food, but its green or brown colour. Corals have the ability to change their colour to extremes of blue, violet, pink, yellow and red to adapt to different light conditions and water temperature.