What are the Smallest Types of Goldfish?


Have you ever wondered how small could the Goldfish get in size? This piece of article will provide an answer to this question and you will also learn so many other things about the goldfish.

Goldfish is native to the Eastern part of Asia, there are lots of distinct breeds that can vary by size, fin and tail configuration, body shape, and colors. They are not known to be aggressive in nature but they can eat smaller fishes when hungry.

Do Goldfish Stay Small?

The smallest type of goldfish is the Twisty Tailed Goldfish that grows up to 6 inches in length.

There are several kinds of Goldfish species out there, the top 5 ranked of them are as follows

Gold Fish Breed Size
The Twisty Tail Goldfish (Tosakin) < 6 inches
The Butterfly Goldfish Up to 8 inches
The Ryukin Up to 9 inches
Double tailed Goldfish 8-10 inches
The Single-tailed Goldfish (including Orandas, and Shubunkin). Up to 14 inches

How Long Does It Take for a Goldfish to Grow to Full Size?

Are you wondering for how long it will take the goldfish to reach its full size? It should take about 8 weeks for the goldfish to attain its full size.

The answer will depend on the environment, water condition, food type, and health. The fries will have the same physical features as the 5-week old goldfish and this growth rate is similar to all varieties of goldfishes.

After the first 5 weeks, the deep-body varieties of goldfish will start taking the adult shape. The growth rate of deep-bodied goldfishes will slow down after 5 weeks compared to the slim-bodied varieties.

In order to increase its body length by 25% or more, the slim body goldfish will tend to double its body weight.

It takes four days for the eggs to hatch and spawning will take place with fries having up to 4mm of body sizes.

Types of Goldfishes and Their Characteristics

There are lots of different Goldfish species around, though the Butterfly, Ryukin, Orandas and Twisty tail goldfish tend to be the most popular.

The common oldie goldfish are common feeder fishes commonly found in bright orange colors. These are single-tail goldfishes that can grow up to 12 inches in length.

The Comet goldfish has a longer fin than Oldie goldfish and has a metallic red color. This goldfish can grow up to 14 inches in length.

The slender and speckled Shubunkin goldfish comes with metallic and clear scales body. It is a sturdy fish that can grow up to 14 inches The Wakin goldfish is a single tail fish that grows up to 12 inches and it is characterized by a blend of white and red colors.

The Jikin is a short double-tail goldfish with red lips, red gills, red dorsal fins, and red scales. It grows up to 10 inches in length. The Watonai goldfish comes in varieties of colors and can grow up to 12 inches.

The Egg-shaped goldfish has a slim and delicate body. The Frank Fantail goldfish comes in metallic orange color and can grow up to 8 inches.

The Ryukin Goldfish is a tall and proud fish with a bigger hump. It comes in solid red and white colors and grows up to 9 inches in length. The Tamasaba is a single tailed goldfish known for its very fast-swimming style. It grows up to 8 inches.

The Telescope eye goldfish comes with protruding eyes and it is also referred to as the Popeye. It comes with lots of different colors. The Angelic Veil-tail comes with a square-shape fin that is constantly flowing. It can grow up to 12 inches in length.

Other goldfish species that are worth mentioning include; the butterfly, Pom pom, Oranda, Pearl Scales and the Dorsal-less varieties.


How to Provide Good Tank Conditions for Optimal Growth of Goldfish

Goldfish can increase its body length by as much as 50% in the first 7 days, but these rates are totally dependent on the type of food and aquarium conditions.

Goldfish are predominantly lovers of fresh water. Even though they may tolerate hard and soft water, they will not tolerate water that contains high ammonia or high pH, neither will they tolerate water with extremely low dissolved Oxygen, especially that caused by pollution.

Frequent water changes are required to raise goldfish in tanks. Due to their extensive growth, which can reach 14 inches, these fishes must be kept inside a tank of sizes of up to 50 gallons. You need to change as much as 20% of tank water on a daily basis.

If you keep fries in crowded conditions, you may have to replace as much as 30% of the water on a daily basis. Goldfish is known to produce hormones that can inhibit its growth and that is the reason why most people believe that goldfish will only grow to the size of its container.

The build-up of certain hormones by goldfish will affect the growth of tank mates, hence you need to replace tank water as frequently as you can.

It is also important that you provide sufficient space or add filtration. Goldfish will require up to 24 sq. Inches of filtration. This will provide enough Oxygen for the fish to process the food needed for optimal growth.

While water temperature of 24 C degree is needed to hatch the eggs and maintain optimal growth of Goldfish into the adult stage, some species may require slightly higher temperatures to keep their scales and color changes.

You must avoid placing your aquarium directly in the position of the sun to avoid excessive heating of the water. Though you do not need to cover the tank with a shade, a darker and quieter area of the home is much more preferred.

Goldfish is known for its huge appetite, the fry, for instance, will eat an equivalent amount of its body weight in a day. The fry or young goldfish must be fed live food containing a sufficient amount of protein daily and this can be supplemented with prepared meals after the first 5 weeks.

Goldfish must be kept at optimal health. Fishes that are smaller than 2-inches in length are susceptible to a wide range of parasites including the body flukes and gill flukes. These parasitic infections will either kill the goldfish or slow down its growth.

If you are starting with the fries, then you need to ensure they are fed twice daily and give them sufficient food that can last for at least an hour. Giving goldfish too much food can make them exceed their average growth length. Brine shrimp is one of the best natural foods for goldfish.


In conclusion, the goldfish is a freshwater fish and it is one of the most commonly reared fishes in aquariums in homes. Though goldfish can be kept in tanks and reared by beginners and experts alike, they must be taken care of just like any other fish reared inside a tank.

The only way you can help the goldfish to attain its optimal growth rate is to ensure the right tank conditions, most especially the water pH.

You should know that your goldfish is becoming uncomfortable when it starts rubbing its body against some components in the tank.

For instance, a goldfish may rob its fin against the rock and plant when the pH is shooting pass 8.5. The only way to avoid this issue is to change at least 25-30% of the tank water on a daily basis.

In addition to replacing the water frequently, dead matter, including plants and wood must be removed immediately they are sighted because they contribute to higher pH levels.

You may want to limit the feeding of Goldfish to twice a day to avoid food remnants from lowering or raising the pH levels of water excessively.

Make sure you keep a tank mate of the same size as your goldfish, a more aggressive and bigger tank mate may kill your goldfish by mistakenly seeing it as food.

Goldfish are upward swimmers, in as much as they enjoy moving around water plants, they must be provided with sufficient Oxygen.

Saurabh Kumar

I am a passionate fish keeper, with years of experience in my hobby. You will find some really useful tips and information that I have learned along the way.

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