We are all familiar with how vibrant the undersea worlds are with all sorts of colourful coral reefs and marine life. Set against a grey monochrome background, the outlines and details of the corals are clearly defined. Contrary to popular belief, real corals are actually white, and the colours we see often come from the tiny symbiotic plant cells that live within most types of coral polyps. They help the coral survive by providing it with food made from photosynthesis. Without them, the coral w
