May 24

Sarah Robertson

Are Ryukin Goldfish Easy to Care for?

Goldfish have been popular as pets for hundreds of years, and they are still one of the most common fish kept. Goldfish come in a variety of hues and sizes, each with its own distinct personality and care requirements. Ryukin Goldfish is one of the many types of goldfish, and they are frequently chosen by both novice and experienced aquarists alike.

Decorating your house with a Ryukin goldfish can be a great way to add some color and interest to your home. But are they easy to care for? This is a question that many people ask and in this article, we will talk about how to take care of Ryukin goldfish, what they need, and whether or not they are easy to care for.

What Is a Ryukin Goldfish? 

The Ryukin Goldfish is among many varieties of fancy goldfish. The Ryukin is a robust and beautiful fancy goldfish variety with a pointed head and a prominent hump on the back of its head.It may be long-finned or short-finned, and it can have either a triple or quadruple tail. The rear fin is tall, while the caudal fin is frequently twice as long as the body. The caudal fin may have three or four lobes.


The Ryukin is of Chinese origin. It's difficult to determine when the Ryukin was developed, but it seems to have originated in Wakin. The name comes from the idea that it arrived in Japan via the Ryukyu Islands.

Ryukin Goldfish is a form of fish developed solely for ornamental purposes. They are ideal low-maintenance pets for both well-kept aquariums and ponds, and they come in a variety of colors.

The Ryukin Goldfish's distinctive hue is the reason for its appeal. They are also called Calico Goldfish because they are mostly orange and white with mottled black spots covering their entire body.


Ryukin goldfish is one of the most beautiful and peaceful fish, which is why they are popular among aquarists. The Ryukin's body is squat and short, with a rounded belly. They have a big dorsal hump that connects their head to the rest of their body, giving them an extraordinary appearance.

The most popular color for the Ryukin is orange, although they are also commonly red and white. The calico versions are the most costly and sought after. They have black splotches over their bodies and fins, as well as red and white patches on the top.

There are two types of Ryukin goldfish: short-finned and long-finned. The long-finned variety is more popular due to its greater demand. Their flowing caudal fins add to their beauty, which is punctuated with bright hues of color.

Differentiating Males and Females

Differentiating Males and Females

Is your Ryukin goldfish male or female? Like other goldfish, the only way to tell the difference is by looking at their physical features. Here are some things you can look for if you want to know the gender of your fish:-

  • When compared to females, male Ryukin goldfish have more fluttering fins and tails.
  • In male goldfish, the pectoral fin is usually thicker and longer. The pectoral fins are usually more pointed in males than in females.

  • Females will have a larger rounder body and a softer abdomen. Whereas males have a slightly smaller and skinnier body compared to females.

  • Males also have breeding tubercles on their gill covers, which are not present in females. These bumps help the male to grip the female during spawning.

  • During the breeding season, a male Ryukin Goldfish's vent is flat and difficult to spot. It's simply a tiny hole tucked away under their tails. Whereas, the vent in female goldfish will expand and puff up.

Ryukin Goldfish Size

The Ryukin is a popular aquarium fish that may grow up to 8 inches (21 cm) in length. Some Ryukins are said to reach a length of 10 inches in large aquariums and commercial ponds.

Ryukin Goldfish Lifespan

The typical lifespan of a Ryukin goldfish is 10-15 Years, though some have been known to live up to 25 or even 30 years in the right conditions. Factors such as diet, water quality, and tank size can influence how long these goldfish live.

Behavior & Temperament

Are Ryukin goldfish friendly? Yes, Ryukin goldfish are relatively peaceful fish that get along well with other goldfish and small peaceful fish. They are not known to be aggressive or nippy, making them ideal tank mates for other goldfish. These goldfish are active during the day and prefer to be in groups. They do best in schools of at least 6 fish.

Ryukin is considered to be hardy fish, which means it can withstand a variety of water conditions. They do best in well-filtered tanks kept at room temperature.

Given their calm demeanor, Ryukins are great for beginners. They are ideal low-maintenance pets that require little maintenance to keep them healthy and happy.

Ryukin Goldfish Tank Set-up

Ryukin goldfish are easy to care for and make a great addition to almost any aquarium. Even though these fish species are called "Fancy Goldfish", they are hardy and adaptable, and they do well in a wide range of water temperatures. However, Setting up a proper tank is important to keeping your Ryukin healthy and happy.

Here are some of the most important things to know about the Ryukin Goldfish tank set-up:

Tank Size 

Providing your fish with the correct size enclosure is critical to their health and survival. Let's say you only have a single Ryukin. In that instance, all you need is a minimum tank size of 10 gallons or more. However, if you plan on keeping multiple fish, it's best to add 10 gallon of water for each additional fish. So, a 30-gallon tank could accommodate three Ryukins quite comfortably.

Providing a larger tank for this type of goldfish will not only help to reduce stress on your fish but also make it easier to maintain water quality. A larger aquarium also allows you to create a more natural-looking environment for your fish.

Water Quality 

As with all aquarium fish, water quality is of the utmost importance. It's important to keep the ammonia and nitrite levels in your tank at 0 ppm. Ammonia and nitrite are toxic to fish and can quickly lead to death. The best way to achieve and maintain 0 ppm levels is to perform regular water changes and to use a high-quality filter.

It's also important to keep the pH level in your tank between 6.8 and 7.2. Goldfish are tolerant of a wide range of pH levels, but they prefer slightly alkaline water.

Ryukin Goldfish Temperature

Ryukin Goldfish Temperature 

Ryukin Goldfish are cold-water fish and do well in a wide range of water temperatures. The ideal temperature for Ryukin goldfish is between 68 and 72 degrees Fahrenheit. However, they can tolerate water temperatures as low as 65 degrees Fahrenheit and as high as 75 degrees Fahrenheit.

If the water in your tank is too chilly, your fish may become listless and stop eating. On the other hand, if the water is too warm, they may begin to gasp at the surface and have trouble breathing. Checking your tank's temperature regularly and adjusting the heater as needed will help keep your fish healthy.

Tank Necessities

There are a few things that are considered to be essential to a Ryukin goldfish tank. These include:

Filter: To ensure high-quality water and maintain stable conditions in your tank, you will need a filter. A high-quality filter that is the right size for your tank should be enough to keep your water clean and healthy.

Heater: Ryukins are cold-water fish, so they don't require a heater. However, if you plan to keep your tank at room temperature, a heater can help maintain the ideal water temperature for your fish.

Lightning: It's not absolutely necessary to provide lighting in your tank, although it can help make your fish feel more at home. If you do choose to have a light in your tank, make sure that it does not produce too much heat and increases the temperature of the water.

Air pumps: An air pump keeps the water in your tank well-oxygenated. This is important for all fish, but it is especially important for this fancy variety of goldfish, which are very sensitive to low oxygen levels.

Ryukin Goldfish Tank Mates

While not aggressive, these fancy goldfish breeds are fast swimmers, so they'll outcompete most other types of fancy goldfish for food. So, what fish can live with Ryukin goldfish? The following are some good choices:

  • Oranda goldfish
  • Lionheads
  • Fantail goldfish
  • Other Ryukins

Tank Decor

Decorating your goldfish aquarium can be quite an exciting and fun thing to do. Ryukin is an active fish that enjoy exploring its surroundings. They prefer tanks with plenty of places to hide and swim.

Aquarium gravel and Driftwood are all great additions to a Ryukin goldfish tank. Just be sure to avoid using any sharp-edged decorations that could potentially tear their fins.  Objects with sharp corners can be dangerous to your Ryukin Goldfish.

Adding plants to the tank is also a great way to add visual interest and provide hiding places for your fish. You can either use real plants or artificial plants, depending on your preference.

Real plants that can be used in a Ryukin aquarium include Anacharis, Java Fern, Hornwort, and Water sprite. There are many benefits to adding live plants to your tank, including improved water quality and oxygenation.


Ryukin goldfish are not picky eaters. They'll happily accept whatever you offer them. However, it's important to give them a varied and balanced diet to ensure they're getting all the nutrients they need. They must be fed foods that are rich in vitamins and minerals, fiber, fat, and protein.

Protein must make up at least 50% of their diet. This will ensure they're getting plenty of essential amino acids, which help them grow. Their diet should also include regular amounts of fruits and vegetables such as peas, romaine lettuce, carrots, shelled peas, cucumber, zucchini, and cabbage.

A good diet for Ryukin goldfish includes

  • High-quality goldfish pellets
  • Live foods
  • Frozen food such as frozen brine shrimp
  • freeze-dried bloodworms
  • Vegetables such as zucchini, peas, and lettuce
  • Fruits such as oranges and watermelons

For optimum health, it's best to feed this species of goldfish several small meals throughout the day rather than one large meal. Feeding 2-3 times per day is recommended, with feedings spaced a few hours apart. This will help reduce the amount of uneaten food that sinks to the bottom of the tank and decays, which can lead to ammonia spikes. Regular water changes and tank cleanings will also help keep your fish healthy and happy.

Common Ryukin Goldfish Diseases

Common Ryukin Goldfish Diseases 

Ryukin goldfish, like most goldfish, are prone to a few different diseases. These can be caused by a number of factors, including low water quality, overfeeding, and improper tank conditions. The most common goldfish diseases include:-

  • Ich: Ich is a common goldfish disease that manifests as white spots on the fish's body. It is caused by a parasitic infection and can be treated with medication.
  • Fin Rot: Fin rot is an infection that causes the fish's fins and tail to degrade, eventually resulting in the death of the fish if left untreated. Fin rot is often caused by poor water quality or overfeeding.
  • Velvet Disease: Velvet disease is a common infection that can cause your Ryukin goldfish to lose its color and develop a velvet-like appearance. It is caused by a parasitic infection and can be treated with medication.
  • Dropsy: Dropsy is a disease that causes the fish's body to swell up. It is often caused by poor water quality or an infection. If left untreated, it will eventually result in the death of the fish.
  • Fluke Diseases: Fluke disease is a parasitic infection that can cause your Ryukin goldfish to lose its appetite and waste away. It is often fatal if left untreated.
  • Costia: Costia is a common infection that manifests as white spots on the fish's body. It is caused by a parasitic infection and can be treated with medication.
  • Anchor worms: Anchor worms are parasitic infections that can cause red sores to appear on the fish's body. They can be treated with medication, but they may require repeated treatments.
  • Swim bladder disease: Swim bladder illness, sometimes known as flip over, is a frequent problem among aquarium fish. The swim bladder is an internal gas-filled organ that aids in a fish's ability to control its buoyancy and thus stay at the same depth without having to waste energy swimming.
  • Bacterial infections: Bacterial infections are common among goldfish and can cause a variety of symptoms, including sores on the skin or around the gills, discolored scales, and bloating. They can often be treated with antibiotics.


The symptoms of these diseases can vary depending on the type of disease and the severity. However, some common symptoms include:

  • Loss of appetite
  • Clamped fins
  • White spots on the body
  • Velvet-like appearance
  • Red sores on the body
  • Swollen body
  • lethargy

If you notice any of these symptoms in your fish, it's important to take action immediately. The sooner you catch and treat a disease, the better the chances are for a successful recovery.


There are a few things you can do to help prevent the occurrence of diseases in your Ryukin goldfish. These include:

  • Regular water changes
  • Using a water conditioner to remove chlorine from tap water
  • Keeping the tank clean and free from debris
  • Avoiding overfeeding
  • Avoid overcrowding the tank with fish
  • Providing an optimal tank environment with plenty of space, good water quality, and consistent temperatures

If you're consistently following these tips and keeping a close eye on your fish's health and behavior, you can greatly reduce the likelihood of diseases occurring in your Ryukin goldfish. However, even with the best prevention methods, it's still possible for your fish to become sick. It's important to be prepared for this possibility and know how to properly treat your fish if they do become ill.


If your Ryukin goldfish does become ill, there are a few things you can do to help them recover. These include:

  • Quarantining the sick fish in a separate tank
  • Using a water conditioner to remove chlorine from tap water
  • Keeping the tank clean and free from debris
  • Avoiding overfeeding
  • Adding a variety of vitamins and nutrients to the water
  • Providing an optimal tank environment with plenty of space, good water quality, and consistent temperatures
  • Treating the fish with medication prescribed by a veterinarian
Ryukin Breeding


Ryukin goldfish can be difficult to breed, especially in the home aquarium setting. The best way to successfully breed these fish is by putting them in a separate tank where you can control their environment and monitor their breeding behaviors closely.

If you're looking for an effective method of breeding your Ryukin goldfish, it's recommended that you work with a qualified professional or seek out expert advice.

When to Breed 

The best time to breed your Ryukin goldfish is during the spring and summer months when the water temperatures are warm. These fish typically spawn in late May or early June when the water temperature is between 68-74 degrees Fahrenheit.

If you live in an area with a colder climate, it's important to account for this when breeding your Ryukin goldfish. You can do this by increasing the water temperature in the tank or using a specialized heating device to create warmer conditions where they will be more likely to spawn.

Preparing for Breeding 

If you're ready to breed your Ryukin goldfish, there are a few things you need to do in order to prepare. These include:

  • Selecting the right fish: It's always best to select a group of Ryukin Goldfish rather than just selecting a pair as this will increase the chances of successful spawning. You should also choose fish that are of similar size and age so they're more likely to be compatible. They must be healthy and should not have any visible defects.
  • Conditioning the fish: Once you've selected your Ryukin group, you need to condition them for breeding. This can be done by feeding them a high-quality diet and keeping the tank clean. You should also make sure the water temperature is warm enough to encourage spawning.
  • Setting up the tank: The next step is to set up the Ryukin breeding tank. This should be a separate tank from where your fish are currently living. The tank should be at least 20 gallons in size and have a water temperature of 68-74 degrees Fahrenheit. You'll also need to add some plants or other decorations for the fish to hide in.


Once you've prepared the tank and selected the right group of Ryukin, it's time to spawn them. This is done by introducing the fish to one another and waiting for them to begin breeding. Adding a group of fishes will increase your chances of success as they will be more likely to spawn in larger groups.

If the fish are spawning, you'll notice them swimming close together and releasing sperm and eggs into the water. At this point, you can remove the fish from the tank to prevent them from eating their own eggs or becoming aggressive towards one another.


Ryukin Goldfish Fry Care

After spawning has occurred, you'll need to take care of the eggs. The eggs should be fertilized within 24 hours and will hatch within 7-10 days. Once they've hatched, you can move the fry to a separate tank where they can grow and develop.

You don't have to feed them for the first few days as they will live off their yolk sacs. Once they've used up their yolk sacs, you can start feeding them small amounts of food several times a day. Some good fish fry foods include baby brine shrimp, daphnia, and micro worms. It is very important to maintain clean water conditions. This means removing any uneaten food or waste and adding necessary water treatments as needed. You should also monitor the tank temperature to make sure it's consistent, which will help your fry grow faster and healthier.


Is Ryukin a Fantail?

The Ryukin Fancy Goldfish is a descendant of the ordinary Fantail native to the Ryukyu Islands off mainland Japan and Taiwan in the late 1700s. The name Ryukin comes from this chain of 55 islands. They are very popular in both home aquariums and commercial ponds due to their distinctive appearance and peaceful nature.

Are Ryukin Goldfish Easy to Care for? 

Some people may find the care requirements for Ryukin goldfish to be relatively easy, while others find them more challenging. Factors such as water quality, tank size, diet, and other aquarium conditions can impact how easy they are to care for. Keeping the water clean and well-filtered, providing a varied diet of high-quality foods, and maintaining appropriate tank size are critical for keeping Ryukin goldfish healthy.

How Long Do Ryukin Goldfish Live? 

The lifespan of a Ryukin goldfish is typically 10 to 15 years, though some have been known to live more in the right conditions.

Are Ryukin Goldfish Aggressive?

Ryukin goldfish can be aggressive among themselves, especially when spawning or during feeding. However, they are generally very peaceful in nature and do not pose a threat to most other species of fish.

How Do You Take Care of a Ryukin Goldfish Fry? 

Taking care of a Ryukin goldfish fry is similar to taking care of other types of goldfish. Provide them with high quality, nutritious food, clean water conditions, and a spacious tank with good filtration. You should also monitor the temperature of the water to ensure it is consistent and optimal for growth and development.

Additionally, you may need to use special water treatments or add supplements to promote healthy growth. Finally, be sure to remove any uneaten food or waste to prevent contamination and disease.

What Size Tank Does a Ryukin Goldfish Need?

A 10-gallon tank is generally recommended for a single Ryukin goldfish, though larger tanks are preferred to maintain good water quality. It is important that you also use a filter and heater in the tank to control water conditions and temperature, respectively.


Ryukin goldfish are beautiful fish that make a great addition to any home aquarium or outdoor pond. They are peaceful, friendly fish that enjoy plenty of room and clean water conditions. To keep them healthy, it's important to provide them with the right diet and care routine, including regular tank maintenance and appropriate tank size.

With proper care and attention, Ryukin goldfish can live for 10 to 15 years or more. In this article we have discussed the Ryukin goldfish care requirements and why they make great pets. We hope you've found this information helpful and will consider bringing a Ryukin into your home aquarium!

Sarah Robertson

I am a passionate blogger who also happens to be a fish keeping enthusiast. Writing about my hobby is something that I absolutely love to do, and it's no secret that my chosen topic is always centered around fish keeping.

Sarah Robertson

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