Goldfish Quick Profile

 

 

Description: Goldfish come in two distinct subsections, Koi and Goldfish. There are many different types of both Koi and Goldfish. The types are described in my Guide to the Goldfish


Species: Carassius Auratus

Origin: Coldwater streams in China

Temperature: 60-70 for common and koi, 65-74 for fancy. Can survive through frost and 100 degree weather for short periods of time.

pH-Neutral dH- Hard

Feeding: Goldfish flakes are readily available. Pellets are better, however, as they have a higher consumption rate (easier for the fish to find) and are less likely to decay and fowl the tank. Look for food specifically for your type. (Fancy, common, koi)

Breeding: Has a temperature trigger. See Guide to the Goldfish

Temperament: One of the most peaceful fish in the hobby. They will beg for food and chase tank mates away from it. May eat very small tank mates when very large, but most fast fish can keep well away. 

 

Adult Size: Common: Slightly over a foot (14 inches) Fancy: up to 10" Koi: over 2'

Lifespan: Over 20 is quite common in well-cared for specimens. Minimum tank size: 10 gallons for fancy, 15 for common, 100+ for koi (ponds are the norm)

Comments: Goldfish are an unfortunate target of many beginners. Because of their huge space requirements, they can not be kept in bowls and small tanks, and because of their waste production, they need a large amount of filtration and frequent water changes. If you think keeping a goldfish alive for over a year is lucky, you have some serious research to do. Remember that these are living things, and they can feel pain. For more info, see my Guide to the Goldfish

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By Eric Smith