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Celestial Eye Goldfish — Carassius auratus auratus

Celes­tial Eye Gold­fish — Caras­sius aura­tus aura­tus or Choten gan is an egg-shaped, dou­ble-tailed breed of fan­cy gold­fish. They have a breed-defin­ing pair of tele­scope eyes which are turned upwards, pupils gaz­ing sky­ward. When the fry hatch, the eyes of young Celes­tials are nor­mal but grad­u­al­ly pro­trude side­ways, as in the Tele­scope eye gold­fish, and then turn upwards with­in a peri­od of six months. The body is short and stub­by with a dou­ble cau­dal (tail) fin and a dou­ble anal fin. The Celes­tial eye gold­fish will swim in all areas of an aquar­i­um space.

Com­mon Name: Celes­tial Eye Gold­fish, Celes­tial Gold­fish, Deme-Ranchu
Sci­en­tif­ic Name: Caras­sius aura­tus aura­tus

Ori­gin: Chi­na

Sex­ing: Dur­ing the breed­ing sea­son the male has white prick­les, called breed­ing tuber­cles, on its gill cov­ers and head. Seen from above a female will have a fat­ter appear­ance when she is car­ry­ing eggs. It is impos­si­ble to sex Gold­fish when they are young and not in breed­ing sea­son, but gen­er­al­ly the male is small­er and more slen­der than the female.

Size: 3 — 6 inch­es

Life Span: 10 -15 years. It has been known to live up to 25 years in some cas­es.

Nat­ur­al Habi­tat: They inhab­it the slow mov­ing and stag­nant waters of rivers, lakes, ponds, and ditch­es feed­ing on plants, detri­tus, small crus­taceans, and insects.

Aquar­i­um Size: 20 — 30 gal­lon tank for your first gold­fish and then increase the size of the tank by 10 gal­lons for each addi­tion­al gold­fish. Big­ger is bet­ter.

Species Com­pat­i­bil­i­ty: Water-Bub­ble Eye Gold­fish, Tele­scope Gold­fish, and Lion head Gold­fish

Care Lev­el: Not rec­om­mend­ed for begin­ners. The Celes­tial eye gold­fish ave a low­er tol­er­ance for poor water con­di­tions. They need good care and lots of space.

Ide­al Tank: Pro­vide a grav­el sub­strate to help cre­ate a nat­ur­al and com­fort­able envi­ron­ment for your fish. You can add some decor. Remem­ber that the eyes of the Celes­tial Eye Gold­fish are a hand­i­cap and these fish have very poor vision. Make sure that all orna­men­ta­tion is smooth with no pro­trud­ing points or sharp edges.

Aquar­i­um Water Tem­per­a­ture: Between 65 — 72° F (18°- 22° C)

Aquar­i­um Water pH: Range 6.0–8.0

Feed­ing: The Celes­tial Eye Gold­fish are omni­vores. They will gen­er­al­ly eat all kinds of fresh, frozen, and flake foods. To keep a good bal­ance, give them a high qual­i­ty flake food every day. Feed brine shrimp (either live or frozen), blood worms, Daph­nia, or tubifex worms as a treat. Due to their upturned eyes, the Celes­tial Eye Gold­fish have poor vision and a hard­er time see­ing their food, so they need extra time to feed. They will also nib­ble on live float­ing aquar­i­um plants like lim­no­bi­um (frog bits) or salv­nia.


Oth­er Con­sid­er­a­tions: Through selec­tive breed­ing, the Celes­tial Eye Gold­fish devel­oped eyes that are per­ma­nent­ly locked in an upward posi­tion. This is one of more than 125 cap­tive-bred fan­cy gold­fish vari­eties.