There are many different types and forms offancy goldfish available to keep as pets. They all have different shapes, fin appendages, deformities and oddities that have been bred into them over many, many years.
All forms of fancygoldfish originated from the standard goldfish, which in turn originated from the common carp. They are generally hardy and a pleasure to keep as long as some basic ground rules are adhered to.
Fancy goldfish must be kept in a reasonably sized aquarium that has adequatefiltration. They are hardy fish but do require slightly more care than the common goldfish. As they are bred purely for there looks they tend to have a slightly lowered immune system making them more vulnerable to poor water quality problems. Therefor regular tank maintenance is a must and overstocking is a definite no no.
Fancy goldfish will grow to the size of a small apple so we would recommend keeping no more than two small fish in a 30 litre aquarium, with the intention to re home them if they become out sized of the tank.
Fancy goldfish can live with other temperate water fish such as danios and white cloud minnows but must never be kept with normal goldfish, sarasa comets or shubunkins. These relatives may see your fancy goldfish as being weak and attempt to attack them or over power them for food.
Most fancy goldfish can be fed a specialpellet food designed for goldfish. These pellets create less mess and are easier for the goldfish to eat. The exception to the rule is lionhead or ranchu goldfish as these prefer to be fed a sinking pellet.
One disease that fancy goldfish are particularly prone to is swim bladder problems. This generally can be avoided by following the above rules but can sometimes occur due to the in breeding of the certain species. In this case alleviation can be provided several ways such as raising the tank temperature and salt bathing.