Blue Turquoise DiscusBlue Turquoise Discus (scientific name: Symphysodon sp.) catch the hearts of aquarists by the vivid combination of blue and red patterns striations on over the disc shaped body, dorsal and anal fins, and on the gill. Such strain is known as being developed in US regions from several crossings of wild and tank raised blue and green Discus. Given the average large size of around 5 8 inches, Discus fish normally require a fairly big aquarium tank to