Kinds Of Goldfish – A Complete Guide To Choosing The Perfect Finny

Do you remember your first pet? For many of us, it was a bright orange fish in a small bowl. We’ve all been there, but the world of goldfish has evolved so much since those days.

Choosing among the various kinds of goldfish can feel a bit overwhelming because there are dozens of breeds, each with its own personality, look, and care requirements. You want a fish that not only looks beautiful but also thrives in the environment you provide.

In this guide, I’m going to walk you through the most popular varieties, from the hardy pond dwellers to the delicate “fancy” types. By the end, you’ll know exactly which Carassius auratus is the right match for your home aquarium or backyard pond.

Understanding the Different Kinds of Goldfish: Single-Tail vs. Fancy

Before we dive into specific breeds, it is vital to understand that goldfish generally fall into two categories: single-tail and fancy goldfish. This distinction is the most important factor in determining tank size and compatibility.

Single-tail goldfish are built for speed and endurance. They have streamlined bodies and a single caudal (tail) fin. These are the kinds of goldfish that are most closely related to their wild carp ancestors.

Fancy goldfish, on the other hand, are the result of centuries of selective breeding. They usually have egg-shaped bodies and double tail fins. Because of their body shape, they are much slower swimmers and often require more specialized care.

The Streamlined Athletes: Single-Tail Varieties

If you have a large tank or a garden pond, single-tail varieties are fantastic. They are incredibly hardy and can handle temperature fluctuations better than their fancy cousins. Let’s look at the top three.

1. The Common Goldfish
The “Common” is exactly what it sounds like—the classic orange fish. Don’t let the name fool you, though; these fish are sturdy. They can grow up to 12 inches long and live for over 20 years if given enough space.

2. The Comet Goldfish
Comets look similar to Commons but have long, flowing tails that trail behind them like a comet’s streak. They are exceptionally fast and active. Because of their speed, they need plenty of horizontal swimming space.

3. The Shubunkin Goldfish
If you love color, the Shubunkin is for you. They feature a “calico” pattern with splashes of blue, red, white, and black. Their scales are nacreous (pearly), giving them a beautiful, shimmering depth that stands out in any pond.

The Ornamental Wonders: Fancy Goldfish Varieties

Fancy kinds of goldfish are better suited for indoor aquariums. Because they aren’t great swimmers, they don’t do well in ponds where they might have to outrun a predator or compete with faster fish for food.

1. The Fantail Goldfish
The Fantail is the perfect “entry-level” fancy goldfish. They have a classic egg-shaped body and a beautiful split tail. They are hardier than other fancies, making them a great choice if you’re just starting your journey into the world of fancy breeds.

2. The Oranda Goldfish
Orandas are famous for the “wen” or fleshy growth on their heads. This growth can eventually cover their entire face! They are gentle giants and come in stunning colors like the “Red Cap” Oranda, which has a pure white body and a bright red hood.

3. The Black Moor
With their telescopic eyes and velvety black scales, Black Moors are a hobbyist favorite. They are “telescope” fish, meaning their eyes protrude from their heads. They have relatively poor eyesight, so they need a tank without sharp decorations.

How to Choose Between Different Kinds of Goldfish for Your Setup

Now that you know the players, how do you pick? It all comes down to your setup and your commitment level. I always tell my fellow hobbyists: “Don’t buy the fish for the tank you have; buy the fish for the tank you’re willing to maintain!”

If you are looking for a low-maintenance pond fish that can survive a chilly winter, go with a single-tail variety. If you want a “wet pet” with a huge personality that you can interact with daily in your living room, a fancy variety is likely your best bet.

Tank Size and Space Requirements

One of the biggest mistakes beginners make is underestimating how much space these fish need. Goldfish produce a lot of waste (ammonia), and small volumes of water can turn toxic very quickly.

For single-tail varieties, I recommend a minimum of 50 to 75 gallons for the first fish. Honestly, they are much happier in a 100-gallon stock tank or a pond. They need room to zoom!

For fancy kinds of goldfish, you can start with a 20-gallon or 30-gallon tank for one fish, adding 10-20 gallons for every additional fish. Remember, a bigger tank is always easier to keep stable than a small one.

Water Filtration and Quality

Goldfish are “messy” eaters and even messier roommates. They don’t have stomachs, so food passes through them quickly. This means your filtration system needs to be top-notch.

I suggest using a filter rated for double the size of your tank. If you have a 40-gallon tank, get a filter designed for an 80-gallon tank. This ensures the water stays crystal clear and safe for your finned friends.

Deep Dive into Popular Fancy Varieties

Let’s take a closer look at some of the more unique kinds of goldfish that often catch the eye of intermediate keepers. These fish require a bit more attention but are incredibly rewarding to keep.

The Quirky Ranchu and Lionhead

Ranchus are often called the “King of Goldfish” in Japan. They lack a dorsal (top) fin, giving them a very rounded, hunched appearance. Their swimming style is a charming “waddle.”

Lionheads are very similar to Ranchus but have a more prominent wen. Because they lack a dorsal fin, they are very slow. Pro tip: Never keep a Ranchu with a Comet goldfish; the Comet will eat all the food before the Ranchu even realizes it’s dinner time!

The Elegant Ryukin

The Ryukin is known for its dramatic hump behind the head. The higher the hump, the more “prized” the specimen is considered. They are quite hardy for a fancy variety and can be a bit more “pushy” than others.

They have a very deep, round body shape. When viewed from the side, a high-quality Ryukin should look almost circular. They come in beautiful red, white, and calico patterns.

The Unique Celestial Eye and Bubble Eye

These are the “special needs” kinds of goldfish. Celestial Eyes have eyes that are permanently locked in an upward-looking position. Legend says they were bred to look up at the Emperor of China.

Bubble Eyes have large, fluid-filled sacs under their eyes. These sacs are very delicate and can easily pop on sharp gravel or plastic plants. If you keep these, use sand substrate and only silk or live plants.

Care Essentials for All Kinds of Goldfish

Regardless of which variety you choose, some care rules are universal. Goldfish aren’t just “disposable” pets; they are intelligent animals that can learn to recognize their owners and even perform tricks!

Diet and Nutrition: Beyond the Flakes

While goldfish will eat almost anything, a varied diet is the key to vibrant colors and a strong immune system. I always recommend sinking pellets for fancy goldfish.

Because fancies have cramped internal organs, they are prone to “gulping” air at the surface when eating flakes. This can lead to swim bladder issues. Sinking pellets prevent this problem entirely.

Don’t forget your veggies! Once or twice a week, feed them blanched peas (with the skins removed), spinach, or kale. This provides much-needed fiber to keep their digestive tracts moving smoothly.

The Importance of Water Temperature

There is a common myth that goldfish are “cold-water” fish. While they can survive in cold water, they actually thrive in “temperate” water. For most kinds of goldfish, a temperature between 68°F and 74°F is the sweet spot.

If the water is too cold, their metabolism slows down, and they become lethargic. If it’s too warm (above 80°F for long periods), their oxygen levels drop, which can cause significant stress.

Common Health Issues to Watch For

Even with the best care, goldfish can sometimes get sick. Being able to spot the signs early will save your fish’s life. Don’t panic—most common issues are easily treatable!

1. Swim Bladder Disorder
If your fish is floating upside down or struggling to stay at the bottom, it likely has a swim bladder issue. This is often caused by constipation or gulping air. A “pea fast” (feeding only deshelled peas for a few days) usually clears it right up.

2. Ich (White Spot Disease)
If your fish looks like it has been sprinkled with salt, it has Ich. This is a parasite often triggered by stress or sudden temperature changes. It’s easily treated with store-bought medication or a slight increase in water temperature.

3. Fin Rot
If the edges of the fins look ragged, milky, or “eaten away,” it’s likely fin rot. This is almost always a sign of poor water quality. Step up your water changes and keep the tank extra clean to help them heal.

FAQ about Kinds of Goldfish

What kinds of goldfish can live together?

The best rule of thumb is to match swimming speeds. Keep single-tails with other single-tails (Comets with Commons). Keep fancies with fancies (Orandas with Black Moors). Never mix the two, as the faster fish will outcompete the slower ones for food.

What is the easiest kind of goldfish to keep?

For beginners with a large tank, the Common Goldfish is the easiest. For those with a standard indoor aquarium (20-30 gallons), the Fantail is the most forgiving fancy variety.

How long do different kinds of goldfish live?

With proper care, single-tail goldfish can live 20 to 30 years. Fancy goldfish generally have a shorter lifespan due to their complex anatomy, typically living between 10 and 15 years.

Do goldfish need a heater?

In most indoor homes, you don’t need a heater because room temperature is usually within their preferred range. However, a heater can be useful for keeping the temperature stable, which prevents stress.

Can I keep goldfish with tropical fish?

It is generally not recommended. Goldfish prefer cooler water and produce more waste than most tropical fish can handle. Additionally, goldfish may try to eat smaller tropical fish like Neons!

Conclusion: Finding Your Perfect Goldfish Match

Exploring the many kinds of goldfish is one of the most exciting parts of the aquarium hobby. Whether you are drawn to the sleek, powerful Comet or the quirky, waddling Ranchu, there is a goldfish out there for everyone.

Remember, the “secret” to success isn’t expensive equipment—it’s consistency. Keep up with your water changes, provide a high-quality diet, and give them plenty of space to grow. Your goldfish will reward you with years of beauty and companionship.

If you’re still unsure which variety to pick, why not start with a Fantail? They offer that classic “fancy” look with a bit more durability for the learning curve. Happy fish keeping, and welcome to the wonderful world of Aquifarm!