Photosynthetic bacteria can consume various types of organic matter with a relatively high growth rate and can consume phosphorous and nitrogenous compounds simultaneously (10). Therefore, photosynthetic bacteria have been used for water purification of fish breeding ponds in Japan. In addition, photosynthetic bacteria have also been used as a feed supplement to intensify the color of carp (Nishiki-goi) and to prevent fish disease during breeding (10).