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The reputation of goldfish dying quickly is often due to poor care. [46] The lifespan of goldfish in captivity can extend beyond 10 years. [47] If left in the dark for a period of time, goldfish gradually change color until they are almost gray. [48] Goldfish produce pigment in response to light, similarly to how human skin becomes tanned in
With the provision of general care and attention, common goldfish can become tame. Once familiar with the face of its owner, swimming towards the fish keeper during feeding time can be observed, and hand-feeding becomes possible. Small goldfish will normally avoid any form of human contact.
Goldfish are typically easy to care for, and black moors in particular are able to withstand a wide variety of temperatures. They do well with other fancy goldfish varieties, especially those with impaired vision such as the bubble eye or Celestial goldfish. In 1941, Moscow aquarist P. Andrianov bred a kind of black telescope with orange-red eyes.
Like ranchu, the bubble eye goldfish lacks a dorsal fin and has a double tail. [4] They normally grow up to 3 to 4 inches in length. If one of their "Bubbles" pop due to pressure or collision with a sharp object, there is a risk of infection where the inside of the sac has been exposed.
Nymph goldfish - It is similar to the fantail, except they have a single caudal fin and anal fin. Considered a byproduct of the breeding process due to recessive genes handed down from fantail or veiltail parents. Tamasaba goldfish (or Sabao goldfish) - It is similar to the ryukin, except they have a single caudal fin and anal fin. A rare type ...
“It’s just crazy to see something that, growing up, you go to the fair and you get a little goldfish in a bag. All of a sudden, you’re seeing one 14, 15 inches long,” he said.