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How many Clownfish Can Live together in a Tank?



How many Clownfish can live together

Every fish is unique and has its own needs in a tank. They have their preferences of water parameters, diet, and many others. The one thing that one usually doesn’t get their head around is how many of it should you keep.

Well, this is also an important aspect, and knowing it will help in the survival of your fish. Speaking of which, clownfish is also one of the fish species for which knowing the numbers is important. 

Clownfish are among the most popular saltwater fishes for an aquarium. They are immaculate fishes with bright colors and having them in a tank is a triumph. Clownfish can make your aquarium look vastly beautiful.

But it is really important to know how many of them you can keep in a tank. In this article, we will deal with that question and other aspects related to it.

How many clownfish can live together? 

In a tank, only two clownfish can live together. Keeping more than a pair of clownfish in a tank is never a good idea.

Yes, they are magnificent fishes and you would want more of them in a tank but keeping more than two in a tank is a bad decision.

The tank can be of any size but only two clownfish can live together. Same with the species of clownfish, every species of clownfish must be kept in a pair and no more than that.

Why do you need to keep two Clownfish together? 

It’s not a necessity to keep two Clownfish together. You can keep a group of them, but the best way to keep Clownfish is to keep them in pairs. They are at their best when kept in pairs. At first, all clownfish are gender-neutral.

They only become males or females at a given time in their existence. If you put two clownfish in a tank, they will fight at first.

The dominating clownfish will then transform into a female, while the subordinate one will transform into a male. 

So everything works out when two Clownfish are kept together. But if you bring in the third one, there are a lot of chances that the odd one will be harassed by the mating pair.

So the odd Clownfish will be shown aggression by the mating pair.

Can Clownfish live alone? 

As mentioned before, two Clownfish need to be kept together. So keeping a single clownfish is not a good idea. A single Clownfish will become stressed and might become inactive.

In a tank with only one clownfish, it will begin to tilt toward becoming a female. There is no need for the clownfish to transform into a male because it has nobody to repress it.

However, as it is the only fish in the aquarium, the gender has no real bearing.

What is the best tank size for a Clownfish? 

Now as you know that Clownfish need to be kept in pairs. They are best when two Clownfish are kept together. But what tank size is optimal for a pair of Clownfish.

Well for a single Clownfish the minimum tank size would be ten gallons. So for two Clownfish a 20 gallon tank is the minimum you should go for.

But this is not the size you should aim for, as you already know the bigger the tank the better. 

How many Clownfish in a 40 gallon tank? 

By doing the math, you can keep 4 Clownfish in a 40-gallon tank. But you must not have more than two Clownfish in a single tank.

It is not a good thing to keep more than two Clownfish in a single tank.

But if you want to pair the Clownfish with other species of fish, then a 40-gallon tank is a good start.

How many Clownfish in a 75 gallon tank? 

In general, a clownfish would need a big tank—about 75 gallons. Still, keeping only a pair of clownfish in the aquarium is probably the best option.

A 75-gallon tank may be beneficial for other factors. When you have two clownfish in a 75-gallon tank, this would be a great size for a communal fish aquarium.

You might be able to build a highly fulfilling communal tank by choosing some good tank mates.

Can you keep Clownfish in a community tank? 

When thinking about how aggressive Clownfish can become towards their kind, you might be having second thoughts about keeping them in a community tank.

But no, Clownfish can get along well with other species of fish. A pair of Clownfish can do well on a community tank, and there is no harm in keeping them in one.  

Clownfish tank mates 

As Clownfish can thrive in a community tank, let’s get on to the best tank mates for them. Having the correct tank mates is crucial for every species of fish. Here are some of the best tank mates for Clownfish: 

  • Yellow Tang 
  • Dartfish 
  • Mandarin Dragonet 
  • Angelfish 
  • Damselfish 
  • Wrasses 
  • Basslets 
  • Gobies 
  • Blennies 

Can you keep different species of Clownfish together? 

Try to avoid keeping several clownfish species close to one another. Conflict will frequently result even from introducing more clownfish of the same species to the aquarium.

So you should limit the number of clownfish you keep in your saltwater tank to one pair of the same species. Anything else is simply a recipe for disaster.

Naturally, if you have a really large tank, you can obtain different results. Different species of clownfish may occasionally coexist in the same tank if they are kept on separate sides of a big tank.

But even these kinds of circumstances can be dangerous. If you are concerned about the welfare and safety of the fish, it probably won’t be worth your while to try to pull this off.


Clownfish might be one of the most attractive fish species, but you are advised to keep only two of the same species of Clownfish together. Keeping more than two of them together is something to avoid. Also, you can keep them in a community tank.

Clownfish might not get along with their kind, but they can get along with other species of fish. So get a pair of Clownfish and keep them in a single but no more than two.

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