Carassius auratus auratus
Ryukin, Butterfly tail, Oranda, Ranchu, Common goldfish
The telescope eye is a fancy goldfish characterized by its protruding eyes.
Except for its enlarged projecting eyes, the demekin is similar to the ryukin. It has a deep body and long flowing fins. Demekins are available in red, red-and-white, calico, black-and-white, chocolate, blue, lavender, chocolate-and-blue and black coloration. They may either have metallic or nacreous scales. Telescope eyes can grow quite large.
Black telescopes is a variant which has a solid black coloration.
Panda telescopes is a variant which has a black and white coloration.
White telescopes is a variant which has a solid white coloration.
There are also red, orange and yellow telescopes.
Due to the telescope's poor vision, it should not be mixed with more active goldfish varieties, and should not be housed in an aquarium with sharp or pointed objects.