First developed by Jack Wattley, the solid Turquoise discus came to be known and popular around 1970. Developed in America, Wattley obtained specimens from various locations in South America, including Belem, Iquitos and Leticia. The Turquoise Discus is a barless and solid-color strain, sometimes also known as Diamond Blue (not to be confused with the Blue Diamond). These all-solid discus were the next mutant strain that came after the Ghost Discus and led to popular strains such as the Royal Blue Discus. They exhibit no stress bars over the body, with a tinge of green coloration. They were very similar to the Blue Diamond bred in Hong Kong. There are four color variants and all were produced within a short period of each other.