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Freshwater fishRed Comet Goldfish
Red Comet Goldfish
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These distinctive pond fish thrive well in the pond and in the aquarium (at room temperature, not tropical temperature).
Goldfish were bred to be viewed from above in the pond, similar to koi, but they still look great in a goldfish bowl.
Quick Facts
| Scientific Name | Carassius auratus |
| Origin | USA (developed from Chinese goldfish) |
| Care Level | Very easy, extremely hardy |
| Temperament | Peaceful, very active |
| Adult Size | Up to 10" or more in ponds |
| Lifespan | 10–15 years; 20+ years in ponds |
| Diet | Omnivore |
| Water Temperature | 50–75°F (tolerates cold winters in ponds) |
| pH | 7.0–8.0 |
| Minimum Tank Size | Pond preferred, or at least 40 gallons for one |
| Shipping Size | Small: approx. 2" · Large: approx. 4" |
Care Guide
Tank setup: Comets are fast, active swimmers that grow big and produce a lot of waste. An outdoor pond is ideal; indoors, give them a large tank (40 gallons or more) with a strong filter, and change 25–30% of the water every week.
Feeding: Feed small amounts once or twice a day, only as much as they eat in about two minutes. Mix a quality sinking pellet or flake with frozen or live foods like brine shrimp and bloodworms, plus blanched peas or other vegetables now and then.
Tankmates: Keep them with other single-tail goldfish like comets and shubunkins, or with koi in a pond. Avoid slow fancy goldfish, which can't compete for food, and tropical fish, which need warmer water.
Ponds: This is where they shine. They handle cold winters as long as part of the pond stays deep enough not to freeze solid. Stop feeding when the water drops below about 50°F.
Good to know: Comets grow quickly, so plan for a pond or a large tank from the start.
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