Picture Editorial Credit: Wildestanimal / Shutterstock The Mandarinfish is Just about the most vividly coloured fish on this planet, present in the coral reefs of the Pacific Ocean. Its system is covered within an intricate pattern of blue, orange, and green, having a vibrant sheen that seems to glow underwater. https://www.scribd.com/document/820709214/4-Facts-About-Maintaining-Your-Aquarium-by-a-Fish-Tank-Cleaner