Description
Celestial eye goldfish or Choutengan[1] is a double-tailed breed of fancy goldfish that has a breed-defining pair of telescope eyes which are turned upwards, pupils gazing skyward.[2] When the fry hatch, the eyes of young Celestials are normal but gradually protrude sideways, as in the Telescope eye goldfish, but unlike the telescope, which has eyes facing outwards on each side, the eyes of the celestial eye turns strictly upwards within a period of six months of development.[3] This process is entirely governed by genetics, though early sources perpetuated the myth that the fish were bred and kept in narrow-necked clay jars and the eyes turned upwards seeking the limited source of light.[4]