{ 4K } Aquarium - AMAZING Discus Tank 5000 gallons The BEST discus tank I have ever seen . Age of aquariums - Signal Hill, CA. Symphysodon, colloquially known as discus, is a genus of cichlids native to the Amazon river basin. Due to their distinctive shape and bright colors, discus are popular as freshwater aquarium fish, and their aquaculture in several countries in Asia is a major industry. They are sometimes referred to as pompadour fish https://en.wikipedia.org/wiki/Discus_(fish)