Fantastic Fantail Goldfish: 35 Care Tips + Useful Facts

Are you a member of the “Fantail Fan Club?”

Sorry, I couldn’t resist 😉

If you are back from a recent trip to the pet store…

… Or have had one for a while now…

Or maybe just want to know more about that fascinating, shiny-scaled creature gliding gracefully through the water…

You’ve come to the right spot, so READ ON!

I Want To Learn About:

Tank Size
Tank Mates

So, What Exactly is a Fantail Goldfish?

This is going to sound like an oxymoron, but the Fantail is the simplest of the fancy goldfish species.

It doesn’t have any unusual features like bubble eyes, pom poms on its nose or brain-like wens that we see on other fish.

And because it doesn’t have a ton of crazy stuff going on with its genetics…

… it is VERY hardy.

They can even do quite well living in ponds!



However, they have a short body and double fins, so they are a bit more fragile than Common or Comet goldfish.

Get this:

“Fantails” get their name from their double tail that is shaped kind of like a triangle when viewed from above. The Chinese name for them is “man-yu.”

If the tail is extra long, the fish has what’s called a “ribbontail.” (But the fish is still considered a Fantail.)

This is interesting:

The size a Fantail will reach depends on how well it was taken care of, but generally they will reach an impressive 6 to 8 inches tip to tip. Some get even bigger.

The Secrets to a Healthy Goldfish Revealed

Learn how to keep your goldfish alive and thriving using the only complete, accurate goldfish manual available today –
The Truth About Goldfish.

Tell Me More!


As far as colors go, metallic red (usually more of an orange) or yellow are the most easy to find.

But there are also calico (which is really nacreous), red and white or even solid white.

Quick Facts

  • Temperature: 70 – 80 degrees F
  • Species name: Carassius auratus auratus
  • Hardiness: Very hardy
  • Lifespan: 30 – 40 years on average
  • Size: 6 – 8 inches on average, usually larger

Breeding Fantail Goldfish!

Fun fact – they are one of the easiest kinds of goldfish to breed!

Of course, it’s still tricky business, but they can be helped along by giving them yummy treats like frozen blood worms or brine shrimp.

And when they do…

You’d better be prepared for a LOT of babies! (Goldfish can have over 1,000 at a time.)


This is How the Fantail Got its Tail!

All goldfish used to be slim-bodied goldfish like the Common – with one tail and one anal fin.

So how did the Fantail end up with 2 of each?

Get this:

Goldfish fins of non-fancies are actually made of a double-layer. But during the Ming Dynasty 600 years ago, a strange genetic mutation appeared…

The double layer of their tail fin and anal fin started to split apart and grow separately!

Betcha didn’t know that one 😉

Early Fantails probably looked a lot like the Watonai goldfish before they were bred to have shorter bodies…


3 Surefire Ways to Know if Your Fish is Actually A Fantail

So, how do you know if your fish is a Fantail – not some other breed of goldfish?

1. Egg shaped body

Fantails fall into the category of “Fancy Goldfish,” which are known for their round, short bodies much deeper than their slim-bodied brothers.

They were bred to be this way to look nice.

But here’s the catch:

This actually gives their organs less space than their ancestors had, making them prone to swim bladder problems from their diet.


(More on that in a minute.)

2. Double tail fins

Fish like the common goldfish (those little guys sold in bulk as feeders in pet stores) have one straight tail fin with 2 lobes on the top and bottom.

Not this fish!

Fantails have 2 tails in one, split down the middle. This gives them 4 separate lobes… unless your fish is has a fused tail – lovingly known as “tripod.”

Quality specimens will have a good split down to the base of their tail.

3. Double anal fins

Granted, not all Fantails have them , but double anal fins are another clue that your fish is one.

(Anal fins are the fins closest to the tail underneath the fish).

4. No other fancy features

The Fantail is the “plain Jane” of the fancy goldfish category without all the showy characteristics other breeds have.


And this is exactly why some people love them – they like that down-to-earth look!

How to Take Care of Your Fantail Goldfish Properly

This might surprise you:

But Fantails are actually one of the best beginner fish.

Because they are so hardy, they are much more likely to survive any mistakes new goldfish owners will probably make.

You will also want to make sure you have the equipment needed to take proper care of your goldfish.

Which brings us to the first point…

Tank Size

One of the most typical places people keep their Fantail in is a goldfish bowl.

BIG mistake.

Bowls aren’t good homes for Fantails at all. Fish who live in them don’t usually last more than a few weeks.


Mostly because they get dirty waaaaay too fast.

While they don’t need nearly as much space to live as the Common, they do need to have the right tank size (meaning ta least 10-20 gallons per fish) to do well.

fancy-goldfish-tank copy

Remember… bigger is better!

Water Temperature

Like all fancy goldfish, Fantails do best in the temperature range of 70 to 80 degrees F.

Good news:

But because they are so hardy, they can be a little more flexible if need be.

They have been known to even survive extreme temperatures, even into the 100’s! (NOT recommended.)



Fantails are omnivores, meaning they eat both plant and animal matter for their food.

A balanced diet is really important to fantails, because with their rounder body shape they are prone to swim bladder trouble.

You can read more about goldfish diet requirements in our feeding article.

Tank Mates

Maybe your pet is longing for a fishy friend.

What other fish can you keep with your Fantail?

Good question.

Fantails are pretty competitive fish and do well with most other types of goldfish, with maybe the best being other Fantails or Ryukins.

It is probably not the best idea to keep them with weaker or more visually impaired fish, such as Bubble Eyes or Celestial Eyes.

The bottom line?

Please don’t put other kinds of fish in, like tropical fish, as they don’t mix well and can hurt your goldfish.


Wrapping it All Up


We’ve only scratched the surface when it comes to caring for your fantail.

There just isn’t enough time to go into all the detail!

But good news – I wrote a complete care guide called “The Truth About Goldfish.”

It contains ALL the information you need to make sure your fish doesn’t just survive, but THRIVES.

I’m sure you want yours to live out its lifespan of 40+ years, right? 😉

You can take a look at it here:

The Secrets to a Healthy Goldfish Revealed

Learn how to keep your goldfish alive and thriving using the only complete, accurate goldfish manual available today –
The Truth About Goldfish.

Tell Me More!


  1. telly September 6, 2016 at 6:32 pm - Reply

    good information. I wish i could read it two week ago when my beatiful lion head goldfish die for not reason. Fine with the temperature. I will keep in mind for next winter season.

    • Clementine
      Clementine September 6, 2016 at 7:59 pm - Reply

      Thanks telly 🙂 Sorry to hear about your lionhead 🙁

  2. jane dugdale September 8, 2016 at 9:00 am - Reply

    I have just got a fantail and an oranda after losing my last oranda. He got stressed I think.

    These two seem very happy. I only feed them every other day.

    • Clementine
      Clementine September 8, 2016 at 1:01 pm - Reply

      Fantails and Orandas are a good combo 🙂 I bet they’ll become fast friends!

  3. Goldie September 10, 2016 at 12:52 am - Reply

    Hello. I have several questions related to my delightful Fantails. I am so glad I have found your site!

    I have two* Fantails; one is about 1 1/2 years old, the other is @ 8 months old. I keep them both in my kitchen area, inside low to moderate lighting, in a 20 gallon size tank. I am very new to having goldfish, and was finally was able to keep my oldest Fantail, Goldie, alive after much trial and error on my part, i.e., getting the water bacteria right, learning not to over-feed, etc. I am very attached to them, and have honestly put lots of time and energy into keeping them alive and healthy.

    My first question is: 1). Can noises from a big storm traumatize a fantail? We recently had a hurricane where I live (no, I am not kidding), and I lost all power for @ 40 hours. However, after only just 6 hours of losing power, and the filter and bubble/air making machine being off, I noticed an immediate difference in my oldest one, Goldie, much to my surprise. He was not moving around much at all, and was hanging out at the bottom corner of the tank, which I know is not normal, or a good sign. I assumed he was/had been perhaps traumatized by the sounds of the wind(s), and tree branches hitting my homes roof, especially since they both seemed okay before the storm..(?).

    I immediately did a 1/3 of a tank water change, and stopped feeding both of them for over 3 days. On the 4th day, my goldfish seemed much better, thank goodness, and was swimming around like he normally does. My other younger goldfish had also seemed very subdued and ‘stunned’ after the storm passed. I fed Goldie and the younger Fantail, one mushed up (cooked) green pea and they devoured it. Now I’m happy to report that both of them are doing great, acting normal, and seem happy and content. 🙂

    I have read that all Goldfish are very sensitive to noises (just like bunnies) even though there was really nothing I could do to prevent them from going the storm other than perhaps trying to cover their tank with a blanket. This hurricane was a rare event, no doubt, but another one could always happen again in the near future.

    They also went w/o their filter or any air bubbles being on for almost 3 days due to the power outage and I had no A/C, and it was getting pretty hot and humid inside my home. I was really worried I was going to lose them.

    (2). How long can Fantails go without* their filter running and having air bubbles? Should I have transported them to a makeshift bucket and tried to have chilled the water with some ice? Would that have helped any? Any suggestions for keeping Goldfish alive during a power outage (other than using a generator, which is costly)?

    • Clementine
      Clementine September 10, 2016 at 4:33 am - Reply

      With the power out like that, not having the filter running makes their ecosystem not as clean. I would be more likely to think it was that, though they do have ears and loud sounds can bother them. Really you don’t want the power out more than 24 hours. But, if worst comes to worst, water changes can help.

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