These natural green foods grow from the bottoms of oceans, seas, rivers, and streams come in great abundance for all fish and plant life is what enhances the blue natural color of tropical fish such as Cichlids and Damselfish. They produce a natural chemical that enhances the colors on the skin of fish called Phycocyanin, which all tropical fish feed off and is the primary in their diet. Live plants are ideal for any aquarium but it also comes in flakes or pellets. Fish will consume it and live food such as bloodworms, shrimp, and brine shrimp.