Species Summary
The Ranchu goldfish is considered the "king of all goldfish" by many. When you see one, it's not hard to see why. This species is unique, beautiful, and undoubtedly regal.

This fish belongs to a group known as "fancy goldfish." Fancy goldfish are specifically bred to have distinct, attractive traits. You won't find any in the wild. These beauties are a product of centuries of selective breeding.

Appearance
If you're looking for a popular type of goldfish with a slew of unique quirks, the Ranchu may be for you. They're unlike most tropical fish species. While they were likely created from wild carp, they don't look anything like fish you'll find living in nature.

Let's start with the profile. The Ranchu goldfish has a bulbous, egg-like body. On the top of the body, you'll notice a distinct curve. These freshwater fish have no dorsal fin, making that curve stand out.

Ranchu Goldfish Lifespan
The average Ranchu goldfish lifespan is between eight and 15 years.

Like all fish you keep in captivity, a Ranchu's lifespan is not guaranteed. Many factors come into play, and the quality of care you provide makes a big difference. These freshwater fish have limited genetic diversity, making them susceptible to a wide range of conditions.

Average Size
There's a good amount of size variation when it comes to this fish. The typical size of a Ranchu goldfish will reach five to eight inches in length when fully-grown.

Ranchu Goldfish Care
Ranchu goldfish care can be a rewarding experience. This species is revered among collectors, and you often see excited aquarists showing off their fish at shows.

Tank Size
Ranchu goldfish don't have massive tank size requirements. They're not the most powerful swimmers, either, eliminating the need for a huge tank that can support fast swimming.

You can technically keep a younger juvenile in a standard 10-gallon tank, but to support the health and well-being of an adult you’ll need at least 30 gallons. However, many experienced aquarists won't go with a tank size smaller than 55 gallons for a single Ranchu if they have the space.

Water Parameters
Ranchu goldfish don't live in the wild, but their genetic ancestors did. The best thing you can do to create a comfortable environment is to mimic the cooler streams of Asia, where wild carp reside.

- Water temperature: 65 to 75 degrees Fahrenheit
- pH levels: 7.0 to 8.0 (Aim for neutral)
- Water hardness: 5 to 19 DH

Tank Setup
Creating a natural and enriching environment is an important part of Ranchu goldfish care. However, it’s worth pointing out that this species is quite adaptable.

The most important thing to remember is their delicate nature. Avoid anything sharp or jagged that could harm the fish's fins or body. Beyond that, you have free rein to create a pond-like tank setup.

Start with a layer of sand or smooth pebbles. Ranchu goldfish have a penchant for digging around and moving substrate, so don't be surprised if hills and pits form.

Next to decor, equip your tank with an appropriately sized filtration system. Ranchu goldfish can produce a significant amount of waste, and you need a filter to handle it.

Common Possible Diseases
Unfortunately, the Ranchu goldfish is often considered a sensitive freshwater fish. This can be influenced a bit based on the genetic diversity of each specimen, but most Ranchus have moderate to high disease risks.

Food & Diet
Ranchu goldfish always seem to have a healthy appetite! They're omnivores that will consume both plant and protein-based foods.

The best diet usually consists of nutritionally balanced flakes or pellets. There's no shortage of high-quality formulas on the market today, and many will help bring out your goldfish's color.

Behavior & Temperament
This species of fancy goldfish is calm, easy-going, and pretty fun to watch.

As mentioned earlier, they're not speedy swimmers. Their anatomy prevents them from zipping back and forth across the tank. But they make due and will explore the environment just like any other fish.

Tank Mates
Ranchu goldfish are perfect for multi-species tanks, but you must be mindful of how others might affect the fish's well-being. They're not aggressive, but they will be the target of fish species that are!

Tank Mates
Ranchu goldfish are perfect for multi-species tanks, but you must be mindful of how others might affect the fish's well-being. They're not aggressive, but they will be the target of fish species that are!

Wrapping Up
Ranchu goldfish care isn’t particularly complicated, but it’s important to get it right. These fish are quite sensitive, and won’t be able to tolerate many mistakes on your part!

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