May 30

Sarah Robertson

How Long Do Ranchu Goldfish Live?

Ranchu Goldfish have a distinctive and unusual appearance, with a variety of hues, forms, and sizes. They might reach huge sizes and live longer if properly looked after. Other slow-moving Fancy goldfish should be mixed with the Ranchu goldfish, nothing too fast that might compete with them for food. Their tanks should be properly maintained and furnished with a required filter and aerator.

The average lifespan of Ranchu goldfish is 10-15 years, with some reaching 20 years. If you want your Ranchu to live a long and healthy life, you need to take care of it properly. This includes providing the right food, clean water, and a suitable environment.

These beautiful fancy goldfish aren't easy to find. In an average fish shop, you're unlikely to come across them. However, if you want to own the "king of goldfish," they're the breed to choose. However, this isn't the easiest goldfish to care for. Their odd body structure necessitates some thought on your part.

Quick Facts About Ranchu Goldfish:

  • Scientific Name : Carassius auratus
  • Common Names : Korean Goldfish, Maruko, Buffalo-head Goldfish
  • Origin : Japan
  • Family : Minnows and Carps
  • Care Level : Moderately difficult
  • Temperature : 65°-77°Fahrenheit
  • Temperament : Social and Peaceful
  • Water Hardness : 4-20 dGH
  • pH Range : 6.5 to 7.5
  • Filtration/Water Flow : Moderate
  • Color Form : Calico, Red, combinations of red and white or gold and white
  • Water Type : Freshwater
  • Lifespan : Approximately 10-15 years
  • Size : 5”-8” in length
  • Diet : Omnivorous, both vegetables and protein are consumed in order to obtain overall health.
  • Breeding : Egg-layer
  • Difficulty to Breed : Moderate
  • Compatibility : Compatible with Other Slow-Moving Fancy Goldfish
  • Minimum Tank Size : 10 gallons for one full-grown adult Ranchu and an additional 5 gallons per tankmate
  • Tank Set-Up : safe and smooth decorations to avoid unnecessary injury but enough to add security within the tank


They're a goldfish breed created by humans that first appeared in the 17th century.

The history of the Ranchu Goldfish (Carassius auratus) begins in ancient Japan, unlike that of other fancy goldfish which began in China. The Ranchu Goldfish was developed by Japanese breeders from the Chinese Lionhead Goldfish. Modern-day Ranchu Goldfish can now be found in almost every corner of the globe, not just in China or Japan.

Ranchu goldfish are not designed for survival in the wild because of their egg-shaped bodies, prominent heads, and hoods. They won't be found in rivers, lakes, or streams either.

Ranchu Goldfish Overview 

The absence of a dorsal fin, as well as the presence of a wen, which is a large head growth, distinguishes these goldfish from other goldfish. It restricts their ability to regulate their bodies while swimming, causing them to be more sluggish. They require more rest in between swims to replenish their strength and swim well.

They're one of the most peaceful and handicapped goldfish due to their body structure. Because of their stocky and rounded body shapes, they are more susceptible to swim bladder disease than most other slim-bodied goldfish.

They are not generally available in most pet stores, and they must be obtained from a respectable breeder who maintains high-quality genetic lines in terms of body and general health. In order to thrive and feel more social and secure, they require at least one compatible tankmate.

The Ranchu's more delicate form and body, as well as their milder disposition, necessitate extra attention. They can become stressed if they are kept in a bare, unfiltered, and understocked habitat. To prevent swim bladder disease and any associated health problems, feed these fish a carefully prepared diet.

Ranchu Goldfish Appearance

Here are some of the physical characteristics of the Ranchu Goldfish;

  • These fancy goldfish are round and chubby, with a body shape that is comparable to the Lionhead or Oranda. In reality, they are so similar to Lionhead that they are frequently misidentified as such.
  • They have no dorsal fin, which is one of the reasons for their limited swimming abilities.

  • A "hood" will distinguish a Ranchu goldfish. A "hood" is a head development that strongly resembles the brain in form. A Wen is another name for these growths.

  • Ranchu's hood is less prominent and sometimes goes all the way over their head.

  • The Ranchu has a wide back and tail fins that fan out almost horizontally.

  • The Ranchu Goldfish can be found in a variety of hues and patterns. The most popular pattern is "bi-colored," which is generally seen in red and white or gold and white.

  • Ranchu is found in solid colors, including red, white, black, and yellow-orange (red), as well as in the calico pattern.

Ranchu Goldfish Varieties

The Ranchu goldfish has a stunning appearance that includes many colors and patterns of metallic scales. Keep in mind that their colors may fade or change over time. They are most often bi-colored, with red and white hues, as well as gold and white, being the most popular.

Do not be concerned if you notice a raspberry-shaped wen growing on top of their head. In fact, in some cases, it may even cover their eyes, which is why they are so sluggish.

  • Black Ranchu Goldfish:This fish has a black body and looks amazing.
  • Calico Ranchu Goldfish: This fish is black, white, and orange in coloration.
  • Red Ranchu Goldfish: The color of this fish is solid red. Some have a tinge of orange, which is quite popular among Ranchu goldfish fans.
  • White Ranchu Goldfish: This fish is snow-white all over its body. Lionhead Goldfish: Ranchu goldfish may be the ancestors of Lionhead goldfish, thus they have comparable features. Like Ranchus, they have egg-shaped bodies and lack a dorsal fin. They lack the shoulder hump and usually have longer bodies than Ranchus.
Ranchu Goldfish Behavior

Ranchu Goldfish Behavior & Temperament 

By nature, these peaceful fish are sociable and sluggish. They may be seen foraging at the substrate during the day for any leftovers of food. They may also be seen resting on the bottom of the tank or hovering in the water for a quick rest.

They are inquisitive and enjoy exploring and investigating their surroundings. Their endearing swimming actions, such as wiggling about the tank and a seeming eagerness to explore, will stand out.

Ranchu Goldfish Care 

If you're considering adding a Ranchu to your aquarium, there are a few things you need to know about how to take care of them.

Ranchu goldfish are a bit more delicate than other goldfish breeds and require extra attention. They're also slow-moving, so they may not be the best choice if you have other, more active fish in your tank.

Ranchu Goldfish Tank Setup

In order to take proper care of Ranchu goldfish, you'll need to provide them with a spacious tank. Here is a list of tank conditions and setup suggestions:

Tank Size: Ranchu requires a tank size of 10 gallons for an adult and 5 additional gallons for each tankmate. Keep in mind that the tank's size varies considerably depending on the size of the goldfish and how many you want to keep in it.

Water Temperature: Goldfish can withstand a wide range of water temperatures, although it isn't ideal. They are temperate water fish. Goldfish are most comfortable between 65° and 77° Fahrenheit.
Goldfish, as temperature fish, should not be maintained above 75 degrees Fahrenheit, with cooling being preferable at all times. Goldfish can also be kept outdoors and even overwinter in the cold.

Water Hardness:  Goldfish prefer hard water with a DH range of 8-12, but can live in soft water as long as the pH is not below 7.0.

pH: They need a pH of 7.2-7.6 in order to survive. They prefer neutral to slightly alkaline pH levels but can survive and even breed in somewhat acidic conditions. pH  below 7.0 is too acidic for goldfish and pH above 8.0 is too alkaline.

Ammonia, Nitrites, and Nitrates: Ammonia, nitrites, and nitrates should all be at 0ppm. Regular water changes will help to keep these levels in check.

Lighting: If your aquarium does not have enough light, you may invest in an aquarium lamp. Ranchu Goldfish need an eight to twelve-hour period of darkness in order to rest, so keep an eye on your fish's clock.

Substrate: For your tank, sand or gravel of appropriate size should be used. Make sure the gravel is big enough that your Ranchu won't choke on it because they like to forage for food. This is why a secure substrate is required to add enrichment. Bare bottom tanks are not ideal for long-term use.

Filtration: It is critical to include a suitable-sized filter to keep the tank's water clean. Make sure it can filter more gallons than the current tank and do water changes according to the bioload and parameters.

Plants: Variety of plants and decorations can be added to your aquarium. They aid in the maintenance of excellent water quality as well as providing enrichment to a fish's diet. They'd most likely eat soft edible plants, If you want to avoid it, opt for plants with thick leaves that are difficult to chew on.

Ranchu Goldfish Tank Environment

You should utilize sand or small gravel as a foundation for creating an attractive and natural environment. You may personalize your aquarium as you wish, but avoid any items with sharp edges or protruding points. Consider using silk plants if you're using artificial vegetation.

If you're using aquarium rocks, avoid boulders with sharp edges or round ones. Driftwood should generally be avoided unless you're rounding out the edges and providing lots of space for your fish to swim.

You may add a variety of plants to create the impression that the environment is more natural. Live plants may not always be appropriate due to their burrowing behavior. Some wonderful plants suitable for Ranchu goldfish are:

  • Anubias
  • Java Fern
  • Water Sprite
  • Java Moss

Make sure your plants are secured to rocks rather than the substrate. Otherwise, your fish may uproot them as they forage for food. The problem with plants is one of the reasons that many individuals choose to use fake plants.

Ranchu Goldfish Feeding

Ranchu Goldfish Feeding

Ranchu goldfish are omnivores that like a wide range of foods. They will eat fish flakes since they are both delicious and nutritious. They require a varied and balanced diet to remain healthy. They are vulnerable to swim bladder disease, so floating food should be avoided so they do not ingest too much air while swimming at the surface.

To keep your digestive system and bodily function running smoothly, provide high-quality flakes, sinking pellets, or gel food in addition to nutritious vegetables to aid with digestion.

Many goldfish die as a result of faulty nutrition, feeding, and/or portion sizes – which may all be readily prevented with an adequate education. If you wish to feed your Ranchu a more natural and nutritious diet, feel free to use any of the following options.

Frozen or freeze-dried food: Ranchu goldfish, in particular, enjoy daphnia and bloodworms. Bloodworms are a favorite of most goldfish, and Ranchu goldfish are no exception!

Fresh food: Goldfish like variety in their diet, including algae, insects, and vegetables. However, be cautious about offering your Ranchu fresh food. Some of them may include parasites that can quickly cause your goldfish significant damage.

Ranchu Fancy Goldfish may take a little longer to feed than other varieties of goldfish. Because of their poor eyesight and fat bodies, they have trouble finding food.

Remove any uneaten food to avoid polluting the water and creating rotting food in the tank, which will result in an ammonia spike. Ranchu should be fed only as much food as they require, but make sure each fish gets enough. The amount of food given to the fish should be limited to what they can consume in less than two minutes.

Ranchu Goldfish Breeding / Reproduction 

Ranchu Goldfish are prolific egg layers that thrive in the right conditions. They may be kept in groups as little as five fish, but they are social animals and most likely to breed in bigger groups. Goldfish may not breed in the wild until spring arrives. To reproduce them in an aquarium, you must imitate natural circumstances.

Provide a tank that is at least 20 gallons and ensure that the fish are healthy and free from diseases. Some breeders advise treating them for parasites. Breeders frequently separate the males and females for a few weeks prior to breeding to encourage them to spawn.

Introduce the fish at the same time into the breeding tank. The tank will require a thick, supportive environment with solid surfaces for the spawning process and egg adhesion. Oxygenating plants like Anacharis, on the other hand, are beneficial. Artificial plants or fibrous spawning mops may also be used.

The temperature can be lowered gradually to around 60° F (11° C) and then slowly raised at a rate of 3°F per day until they spawn, This is done in order to stimulate spawning. The optimum spawning temperature for goldfish is usually between 68° and 74° F (20°-23° C).

During this period, you should feed your fish with a high-protein diet such as live brine shrimp and worms. Feed little portions three times a day, but don't overfeed your Ranchu goldfish. Uneaten scraps will sink to the bottom and pollute the water. The breeding tank should be maintained with partial water changes of up to 20% per day.

As the temperature rises, the male will chase the female around the aquarium in a non-threatening manner before spawning. This can continue for several days, and the fish's color will get brighter.

During the spawning, the fish gyrate from side to side and the male pushes the female against the vegetation. This causes the female fish to drop small eggs, which the male will then fertilize. The eggs may be attached to the plants or mop via sticky threads. The process of producing 10,000 eggs might take two to three hours.

The parents will begin to consume as many eggs as they can find at this point. So, it's critical to remove the parents once the spawning is finished. Depending on the temperature, the fertilized eggs will hatch in 4 to 7 days.

You can feed goldfish fry specialty foods until they're large enough to eat flake or brine shrimp. You may also offer the same food to the parents as long as it is crushed very tiny. Ranchu Goldfish fry is initially a dark brown or black color to better hide and avoids being eaten by larger fish. The adult color is reached after several months and they can be kept with bigger fish once they are about 1 inch long.

Ranchu goldfish

Keeping Your Ranchu Healthy

Make sure your Ranchu has ideal water circumstances to keep it happy and healthy. Running a good filter, having adequate aeration, and maintaining the tank cycling are all necessary. When doing limited water changes, only do so when absolutely required.

It's critical to feed a high-quality, portioned diet to your fish if you want them to grow and stay healthy. To prevent anxiety, keep them away from loud noises and tank motion. Make sure your Ranchu is housed in appropriate surroundings with calm and compatible tankmates. A happy, healthy Ranchu is one that is stress-free. It's important to give adequate care in order for this to happen.

Ranchu Goldfish Diseases: 

The Ranchu can be a natural stress reliever in your home just by being there. It is your duty to guarantee that your Ranchu Goldfish is never stressed or under any kind of pressure. They are susceptible to the following common goldfish illnesses;

  • Swim Bladder Disease: Goldfish that have this condition tend to swim in off patterns and may struggle to have swimming balance.
  • Fungal Infections: A common cause of death in goldfish, these infections can be caused by several different fungi and can affect different parts of the fish's body. Black Ich is a common type of fungal infection that can cause black spots to form on the fish's body.
  • Goldfish ICH: The disease also known as White Spot Disease is an annoying parasite that latches onto the Ranchu's body and feeds it until it has grown large enough to reproduce and begin the cycle again.
  • Cloudy eye: Any number of health issues can induce this condition. It is easily recognizable, as the fish's eyes will become milky or even white in color. It can be treated if caught early, but if left unchecked it will lead to blindness and eventually death.
  • Bacterial infections: Bacterial infections are relatively common in goldfish and can be caused by a number of different bacteria. These infections can affect different parts of the fish's body, including the fins, skin, eyes, and gills. Tail or Fin Rot, Dropsy, and fatal Tuberculosis are all types of bacterial infections that can affect Ranchu goldfish. Fin rot is a very common disease that is caused by a bacteria infection. It starts out as just a small tear or hole in the fins, but if left untreated it can quickly spread and kill the fish. Tuberculosis is a fatal disease that attacks the goldfish's internal organs, including the kidneys, liver, and spleen. It is most commonly found in fish that are kept in poor water conditions. Dropsy is a fatal disease that causes the goldfish's body to fill with fluid. This fluid build-up puts pressure on the fish's organs, causing them to fail. The cause of Dropsy is usually unknown, but it can be caused by bacteria, fungus, or even parasites.
  • Other parasites: Argulus (fish lice) and Anchor Worms are two parasites that can also infect Ranchu goldfish. These parasites attach themselves to the fish and feed off of its blood, causing a number of health problems for the fish.

Ranchu Goldfish Tankmates 

Ranchu goldfish grow to be huge and flop about the tank, but they are very peaceful community creatures. The major problem is tracking down fish that will not bully them and appreciate cooler temperatures.

Much popular community fish, such as guppies, Mosquitofish (Gambusia), platies, and zebra Danios, like cold water. Guppies, Mosquitofish (Gambusia), Platies, and Zebra Danios all do well in room temperatures.

While choosing a tankmate for Ranchu goldfish, look for fish that are peaceful, not too small (they may be eaten), and can tolerate cooler water temperatures.

Some good choices for Ranchu goldfish tank mates include:

  • Koi carp
  • Blackmoor goldfish
  • Bubble-eye goldfish
  • Weather Loaches
  • Guppies
  • Lionhead goldfish
  • Mosquitofish
  • Pearlscale Goldfish
  • Chinese Hi-fin Sharks 
  • Native US Fish
  • Zebra Danios
  • Livebearers
  • Platies
  • Telescope goldfish

Ranchus should not be kept with aggressive, territorial fish or hot-blooded tropical fish (75°F +). Cichlids, such as Oscars and Green Terrors, will bully a Ranchu since it lacks teeth or energy to fight back. Even a tiny Convict Cichlid may be a nuisance to a Ranchu.

Goldfish are not compatible with much tropical fish. They require temperatures of 80 degrees Fahrenheit or higher, which is uncomfortable for Goldfish. High-temperature tropical fish such as tetras, angelfish, and others are likewise unsuitable.

Last but not least, I do not recommend most algae-eating fish. Chinese Algae Eaters, Plecostomus, and other algae-eater species frequently attach themselves to large, sluggish moving fish like Ranchus goldfish for a bite of their nutritious slime coat.

Some of the poor Tank Mates for Ranchu Goldfish are;

  • Territorial Cichlids & Catfish: Since they are territorial they may attack your Ranchu.
  • Plecostomus & Chinese Algae Eaters: These fish might attach themselves to your Ranchu and feed off of their slime coat.
  • Barbs & other fin nippers: These fish might nip at your Ranchu's fins.
  • Tetras & other high-temperature tropical fish: These fish might attach themselves to your Ranchu and feed off of their slime coat.


Ranchu goldfish1

Are Ranchu Goldfish Expensive?

The price of non-competing Ranchu Goldfish varies between 5 and 25 dollars, depending on availability, age, size, and origin. Buying from a pet shop will usually be less expensive due to the significant shipping fees involved in delivering live animals.

Are Ranchu Goldfish Good Tank Mates?

Ranchu goldfish are not suitable tankmates for most fish, particularly fast-moving goldfish. Because of their poor body structure, they have trouble moving about. They may be unaware of food before the other fish because their wen might grow over their eyes and cause vision issues, causing stress and hunger.

They should not be housed with other species of fish or fast, slim-bodied goldfish since they would compete for food or resources. Although they get along and do best with slow-moving, same-size goldfish, they should not compete for food or be subjected to fin nipping since they are peaceful.

Are Ranchu Goldfish Suitable for Your Aquarium? 

If you have a tank with the right size and stocking rate, and if you own or plan to acquire a variety of round-bodied goldfish, a Ranchu will be welcome. Ranchu Goldfish can be kept in any tank as long as you maintain a suitable filter and aeration system, provide attractive decorations, and feed a varied and nutritious diet.

If you follow all of the above care instructions, then you are ready to welcome your Ranchu Goldfish into your aquarium and maintain it! The most essential feature is a compatible tank mate and durable decorations that are smooth, as well as large enough openings for your Ranchu to swim through.

How Long Do Ranchu Goldfish Live?

The Ranchu goldfish lives for around 10 to 15 years. The Ranchu can survive up to 20 years in a properly maintained and adequately cared for aquarium or pond.

How Big Do Ranchu Goldfish Get? 

Ranchu Goldfish reach a length of about 5 inches in most cases, although some keepers report them growing up to 8. The Ranchu's deep belly is about three-quarters of the length of the fish. The Ranchu Goldfish size varies based on care and nutrition as well as the quality of maintenance.

Are Ranchu Goldfish Hard to Take Care of?

The Ranchu is a difficult fish to care for, especially for the first-time owner. They are prone to a variety of illnesses and require some attention in order to be happy and healthy. The Ranchu is only suggested for experienced goldfish owners, as it has certain risks.

Because of their small bodies, rapid head growth, and poor sight, they are regarded as delicate fish. If the water in their aquarium isn't properly cleaned on a regular basis, it is susceptible to bacterial and fungal infections.

Once an illness has set in, the owner is responsible for correcting and treating it as soon as possible. Most first-time owners may not be sure what to look for or how to address the problem. Many Ranchus are dying because their owners are ignorant of the disease.

The Ranchu, therefore, can be difficult to care for and need an experienced owner to assist with their health and prevent potential infections and diseases.

What Kind of Aquarium Do Ranchu Fancy Goldfish Need? 

Goldfish can be quite lengthy, and even the tiniest goldfish require a big tank for the swimming area as well as to avoid oxygen shortages. A 10-gallon tank is never suggested unless you are only transporting home a single fish and the fish will be a tiny one, such as feeder goldfish.

Goldfish are sociable creatures, and only acquiring a single fish for a 10-gallon tank may induce stress and boredom in them. While your Ranchu goldfish is still young, a 20-gallon tank is a reasonable size to start with. However, you should be ready to invest in larger aquariums in the future. If you wish to keep more than one goldfish in a tank, you'll need at least 10 gallons per fish.

This is a good rule of thumb for regulating the number of fish in an aquarium. It also aids in preventing oxygen shortages. Smaller tanks generally require more frequent water changes and tank cleaning. So, if you decide on a small tank, be prepared to spend a bit more time on maintenance.

What Is the Difference Between a Lionhead Goldfish and a Ranchu Goldfish?

  • Ranchus has less head growth than the Lionheads.
  • The back of a Lionhead is flattering, whereas that of a Ranchus is curved upwards.
  • The caudal fin of 'Ranchu' is more slender, with a 45-degree angle, while that of 'Lionhead' is lower and wider.
  • Lionheads have a longer and thinner peduncle (main body), whereas Ranchus are thicker and shorter.

Do I Need to Have an Air Stone (Air Pump) in My Ranchu Goldfish’s Tank?

Yes, but keep it mild since Ranchus are slow swimmers and excessive movement of water will stress them out. They do best in still or very slow-moving water.

Does a Ranchu Goldfish’s Tank Require a Filtration System? 

Yes, all goldfish should have a filtration system in their aquarium. A water filter will help to remove the toxins and ammonia from the water which can be harmful to your fish.

Keep an eye on your filter system's water intake for the Ranchu since they are sluggish swimmers and too much movement in the water might be difficult to handle.

Can Ranchu Goldfish Live Alone?

The Ranchu, like other goldfish, may live a long life alone. As long as they are given enough food and good water quality, these fish aren't fussy about living alone. However, they are social beings who may benefit from social contact. Ranchus like playing with other fish because it enjoys their company.

Keeping them together with other tank mates that won't compete or harass them will make them appear more cheerful. If you want the best for your Ranchu, it's better to put them in an aquarium with similar types of fish. In a tank full of other gorgeous goldfish varieties, they do wonderfully.

Are Ranchu Goldfish Aggressive? 

The Ranchu Goldfish is a docile fish. They are quite amiable and pleasant, with an extremely peaceful disposition. They just don't have the temperament to be violent, anyhow. They can't swim as fast or tire out. They frequently have difficulty seeing with their eyes due to the growth in their heads. Because they aren't capable of competing, you won't see them battling with other fish for food.

However, Ranchus do enjoy foraging for food. If you don't want your goldfish to struggle for existence and fail, avoid choosing aggressive fish as tankmates. They get along quite well with similarly morphed goldfish. They may be kept in an aquarium together without issue. They won't turn your tank into the Colosseum and start battling one another to death, for sure!

How to Identify Male and Female Ranchu Goldfish? 

There are no distinguishing characteristics that distinguish Ranchu Goldfish male from female. You may still get lucky if you recognize the following appearance and behavioral differences:

When females of the species Ranchus become ripe to reproduce, they develop tubercles, a feature that is hardly seen in females. Despite the fact that fish are generally round, females may be rounder and plumper during breeding.

When the mating season begins when females become fertile. Males pursue them as soon as they notice that females are in heat. Furthermore, the gonopodium (sex organ) of a male is more obvious when he is attempting to mate. Females lay eggs, whereas males fertilize them.

So with their actions and a few bodily features, you can identify male and female Ranchu Goldfish.

Do Goldfish Attack Other Fish?

It's highly unusual for a Ranchu Goldfish to become aggressive with other fish of any size. In most cases, other fish (particularly the bigger and more combative types) will harass your lovely Ranchu Goldfish.

How Can You Tell if a Goldfish Is Happy?

Rather than just sinking or floating, a healthy Ranchu will swim more frequently. The fish should also ingest and eliminate waste on a regular basis. To keep your Ranchu happy, keep it with non-agitating tankmates and offer it interesting and varied food.

Do Goldfish Recognize Their Owners?

The Ranchu Goldfish can pick out its owners from a crowd. The fish is scientifically recognized to be able to recall and recognize individuals to whom it's accustomed. The fish's response to the stimulus is exhibited by its excitement, which generally causes it to swim in circles. Especially during feeding time, your Ranchu will likely remember you and come to the front of the tank as soon as it sees you.

Where to Buy Ranchu Goldfish?

You can purchase a Ranchu Goldfish from a variety of places, including your local pet store, online retailers, or even directly from breeders. If you want to be certain of the fish's quality, it's best to buy it from a trusted source. But since this fancy goldfish is difficult to find, most of the people settle for a telescope goldfish or Ryukin goldfish, which closely resemble the Ranchu.

When buying a Ranchu Goldfish, make sure to inspect it for any cuts, bruises, or other injuries. The fish should have a healthy appetite and be active.

Are Ranchu Goldfish Smart?

The goldfish is one of the most popular companion fish kept as a pet. Goldfish have been found to possess memory spans that may last up to three months. They also have the capacity to differentiate between various forms, hues, and sounds. That is the reason why they are considered to be one of the smartest fish species.

Can Ranchu Goldfish Live in a 20 Gallon Tank?

Ranchu Goldfish can reach a length of 6 to 12 inches, and they grow about one inch every year. In a 20-gallon tank, they might not reach their full size. Even if they don't reach that size due to the tank's size, they will be fine.

Does Ranchu Need Sunlight?

Sunlight is essential for a healthy Ranchu and aids in the development of brighter colors, as well as photosynthesis by phytoplankton and wall algae. It also helps to maintain a clean environment. Ranchu becomes overly excited by sunlight if they are subjected to too much sunshine, as excessive swimming may weaken their tail tension, especially when they are young.

How Do You Pick Ranchu Goldfish?

A Ranchu should have a rounded back and no dorsal fin or even remnants of a dorsal fin. The tail should be held at a 45-degree angle. The head should be spherical and broad. The bubbling on the head should be heavy, but not so much as to cover the eye.

How Do You Feed Ranchu Goldfish? 

The ideal food for your Ranchu is a sinking pellet of any kind. It's also beneficial to add well-digestible plant foods such as duckweed, algae, and wheat germ to the diet. Ranchus enjoy oranges, mandarins, live food, worms, and shrimp as a special treat. Feed your goldfish twice to three times daily. Overfeeding goldfish is harmful since it can induce indigestion and/or pollute the tank.

Can You Breed Ranchu and Oranda?

If you're not sure what a Ranchu and an Oranda look like, the Oranda has a dorsal fin but the Ranchu doesn't. The Ranchu's back has a prominent arch and tail fin ends that are angled downward. The Oranda has a straighter backline.

Crossbreeding a Ranchu with an Oranda will result in a few fish and many surprises. Any fish species may inbreed if its descendants are crossed with themselves repeatedly across many generations.

Final Words

The Ranchu goldfish is easily distinguished from other fish due to its distinctive body. The wen on their head, as well as their circular form and arching backs, give them a unique look. The horizontally spreading double tail will impress you when they swim, as it makes them seem very lovely.

If you take excellent care of these fish, your aquarium will end up being one of the most gorgeous goldfish you'll ever see. They'll keep you occupied for a long time and keep you amused! Ranchus keeps goldfish tanks lively and amusing. The average lifespan of a Ranchu goldfish is 10-15 years, but some have been known to live even longer with the proper care.

Ranchu are susceptible to the same diseases as other goldfish, so it's important to keep a close eye on them and take preventive measures. These hardy fish can live for a long time if they're well-cared-for, so it's definitely worth considering adding one to your tank!

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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