Which Goldfish Are The Hardiest?

Goldfish are one of the common pet fish in aquariums. They are quite hardy and can live in diverse environmental conditions. However, some types of goldfish are more vigorous than others.

Which Goldfish Are The Hardiest? The hardiest type of goldfish is the common goldfish. The fish are so easy to care for that they can survive even in diverse outdoor environments. While under these conditions, they can still retain their shape and bright colors.

Which Goldfish Are The Hardiest

Varieties of Goldfish

Goldfish have one of the most numerous variations of all pet fish. They boast of this diversity as a result of their mode of breeding. These varieties have different survival strengths and environmental demands.

Here are some of the famous varieties of goldfish:

  • The Common Goldfish: The common goldfish is the hardiest type of goldfish. They are also large and can grow up to 12 to 18 inches. The standard goldfish are fast swimmers, colorful, and they can thrive well in the competition for food.
  • The Comet Goldfish: They are quite similar to the common goldfish. The significant difference is that the comet fish are relatively longer and have a longer tail fin. They are mainly characterized by their fast swimming ability and their ability to cope with frigid temperatures.
  • The Fantails: Fantails got their name from the nature of their extended “triple” tail. They are one of the least hardy species of goldfish. They usually have humpbacks.
  • The Shubunkins: This variety of goldfish has unique colors. They actively overcome predation because of their fast swimming ability. They typically have bright colors, and shubunkins can grow as large as 12 to 18 inches.
  • The BubbleEye: The BubbleEye is one of the slowest varieties of goldfish. Consequently, they are prone to predations. They are also fragile and not as hardy as others.
  • The Ryukin: This variety of goldfish is quite hardy, and they form the right choice for beginners. One of the outstanding features of this variety is the noticeable hump behind their head. They also have bright colors.
  • The Telescope Eye Goldfish: This variety of goldfish got its name from the nature of its eyes. It also has a natural egg-shaped body and two caudal fins. This variety of goldfish is relatively smaller in size compared to others.
  • The Veiltail Goldfish: The Veiltail goldfish is arguably the most gorgeous goldfish. As much as they are beautiful, they are also very delicate. Consequently, it is best to keep them in the aquarium with enormous protection.

How Hardy Are Goldfish? 

There are hundreds of goldfish varieties available in the market. As much as they have diverse varieties, they also have a variety of environments in which they can cope. Likewise, their survival level varies from indoor to outdoor environments.

While some can survive anywhere, some other varieties need special protection from disease and predators. The latter is the hardy variety of the goldfish, and they can survive well in outdoor environments, including ponds. The former is best suitable for aquariums, where they get more care and protection.

Unlike most other pet or aquarium fish, goldfish is quite hardy and easy to keep. They are not extreme with their nutritional and environmental demands. Likewise, they can live in the same environment with a wide range of aquarium fish.

Likewise, goldfish come in a wide range of colors and body types. The variety of goldfish with slim bodies are hardier than others. This hardiness is because their slim bodies allow them to swim faster than their predators.

Also, the body will increase its chances in terms of competition for food. Moreover, their slim bodies give them an advantage in a small space.

Overall, most goldfish are heavy eaters. Likewise, they are also interactive except for some slow swimmers amongst them. And on average, they are one of the hardiest groups of aquarium fish.

General Tank Requirements for Goldfish

Goldfish are interactive fish. Although most of them are hardy, they, however, love tanks that will give them space to swim around freely. The size of their container can also determine how well you will be able to feed them.

The tank size for goldfish can vary depending on if you are keeping fancy goldfish or the hardy ones. On average, the hardy variant of goldfish requires about 40 gallons, while the fancy goldfish, on the other hand, requires a minimum of 30 gallons.

For a single variant, you should keep a single hardy goldfish in about 30 gallons of water. On the other hand, the selected option can cope pretty well in about 20 gallons of water. The essence of this requirement is to provide them with enough space.

In adding subsequent fish to the tank, you should add 10 gallons of water with every new fish you introduce. Since goldfish is a competitive and interactive fish, you should avoid overloading your tank.

Likewise, using the wrong tank size for your fish can retard their growth. Also, it can quickly turn the tank into a toxic environment due to high waste concentration.

It is essential to carry out partial water change of the goldfish tank regularly. Alternatively, you should place a filter in your goldfish tank. This filter is especially crucial if you don’t have enough time to change the tank water regularly.

Also, you should keep the ammonia and pH level of your goldfish tank in check. High ammonia and toxic concentration in the tank can be detrimental to the health of your goldfish.


Goldfish are one of the most diverse groups of aquarium fish. They have varieties that have distinct properties asides from the standard features they share.

Consequently, there are variations in the level of the hardiness of each variety. Their survival level, competitiveness, and activities vary. While some can cope in any environment, some need special protection.

The common goldfish are the hardiest type of goldfish. They are hardy because they have features that can help them thrive under diverse conditions. They are fast swimmers, and they compete well for food and space.

The hardy ones can thrive in a diverse environment, including outdoor ponds. On the other hand, the less hardy ones are mostly kept in the aquarium as pets. They get special care, protection, low competitiveness, and increased activity in the aquarium.