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Maroon Clownfish: What you need to know before you buy

The Maroon Clownfish, Premnas biaculeatus, is one of the most popular and iconic reef tank fish. They are one of the top 20 most popular saltwater fish species because of their awesome maroon red coloration and 3 white or gold stripes.

There is also a few “designer” variety of this fish available from ORA Farms called Lightning Maroon or Gold Flake.

Table of contents:
How big do Maroon clownfish get?
How long do Maroon clownfish live? 
What do Maroon clownfish eat?
Are Maroon clownfish aggressive?
What kind of anemone do they like?
Can you mix maroon clownfish?

How big do Maroon clownfish get?

Maroon clownfish can get pretty large, growing up to about 6 inches, in length, with the female clownfish being much larger and more aggressive than the male.

maroon clownfish by anew

Image by Aneo

How long do Maroon clownfish live?

MC’s tend to live about 5-7 years, on average. Keep in mind that your individual fish may not live an average life—it could die much older or younger—5-7 years is just a rough estimate.

What is their ideal habitat

These are hardy fish and are tolerant of moderate changes in water chemistry and parameters. Try, though, to keep water in stable conditions in order to provide the best and most healthy environment for your tank inhabitants.As for the tank size, a single Maroon Clownfish requires at least 30-gallons of living space. It is best to keep a pair of fish in a tank that is 55-gallons, or larger.

Regardless of the size of your aquarium, once you add 1-2 maroon clownfishes, they will consider the entire tank to be THEIR TERRITORY–and they will defend it! If you’re planning to keep a pair —be sure to give them a lot of space and ample hiding places within the live rock to allow the male to escape the aggression of the female fish that is much larger than he, or you might just end up with one lonely female.

maroon clownfish in an anemone

What do Maroon clownfish eat?

Maroon Clownfish are quite easy to feed because they are not picky fish. In the wild, they would mainly eat zooplankton they would find in the ocean. In the home aquarium, they will eat just about anything you feed them—flakes, pellets, Mysis shrimp, brine shrimp, black worms.

I generally recommend that you try to feed your fish 2-3 times a day, if possible, although it is certainly possible to keep them relatively healthy with a single, sufficiently sized feeding if life gets in the way.

maroon clownfish

Are maroon clownfish aggressive?

Yes, Maroon clownfish are one of the most aggressive and territorial species of Clownfish. They are notoriously territorial and should be the last fishes you add to the tank, if possible. If you choose to add them to your saltwater aquarium, it is recommended you add them to the tank last, so that every other fish has a chance to establish their territories before the maroon clownfish.

What kind of anemone do Maroon clownfish like?

Maroon clownfish are most commonly paired with the Bubble tip Anemone, Entactaea quadricolor, althought they may also be paired with (less commonly): Macrocactyla doreensis, Cyrptodendrum adhaesivum, or Heteractis malu, commonly referred to as the Corkscrew tentacle, Adhesive and Delicate sea anemones, respectively.

A caution against adding a sea anemone

Many new aquarium owners get their first tank because they imagine themselves with a clownfish pair, swimming in an anemone, but the problem with that ideal vision is that most anemones grow slowly in the open ocean, are wild-caught, and have a terrible track record of success in the hobby (although I haven’t seen any specific, reputable, recent reports about that). (Wilkerson 2001)

compressed bubble tip anemone

If you do have your heart set on an anemone for your clownfish, check out the Bubble Tip Anemone (Entacmaea quadricolor), because they do relatively well in captivity and are even fragged by many aquarists, once they get large enough. They are also one of a few species that naturally host in maroon clownfishes the wild.

However, please note that your clownfish do not need an anemone to be happy and healthy in your tank. In fact, most people do not have an anemone in their tanks.

Do maroon clownfish have to be kept in pairs?

No, you do not have to keep Maroon clownfish as a pair. The choice is up to you. Keeping a solo fish will likely reduce the amount of aggression displayed by them, however, you will also not get to see their natural pairing and bonding behaviors which are often part of the charm in keeping them in a home aquarium.

Pairing up and breeding

If you plan on keeping a pair of these fish in your tank, the traditional advice (check out Wilkerson’s book), is to attempt to pair up a large fish with a small fish. Clownfishes are protandrous hermaphrodites, which is a fancy, technical term that explains that they can change gender, in one direction. They all start out as males but can change gender to become female.

maroon clownfish nestled in an anemone

The female is the larger and more dominant of the two. If you introduce two similarly-sized juvenile males, you run the risk that the two fight to the death, or significant detriment of the other. If, however, you introduce a large and small fish, the lopsided battle for dominance will more likely be won swiftly and with less damage to the losing male.

For more information about pairing up these fish or breeding them, check out this book:


If you can establish a pair, without losing the male, and if you can provide them with enough space, Maroon Clownfish are said to be moderately easy to breed. The eggs and larvae are large, relative to most other saltwater fish, so they are on the easier end of the spectrum, in terms of ease of feeding after hatching.

The eggs are tended to by the parents, much like a freshwater cichlid would.

The eggs hatch in about a week, and a healthy, well-fed pair will spawn on a relatively routine interval (about 4-6 weeks, although individual pairs will establish their own pattern.

Courtship takes place about 3 to 5 days before actually spawning.

As they begin their courting ritual, they will clean a rocky area near the anemone, to provide an adequate place for the eggs to adhere to. They display an intricate courting dance, including leaning towards each other, touching various parts of their bodies, or head shaking.

gold striped maroon clownfish

Can you mix maroon clownfish?

No, do not mix maroon clownfish with any other clownfish species. If you do, there is a very good chance the other clownfish will be killed by the maroon.


  • Maroon Clownfish are very territorial and aggressive
  • Best kept in a tank ~55-gallons or larger
  • Do not require anemones to be happy and healthy
  • Strongly recommend getting a common, Percula or Tomato clownfish instead

Next steps

Check out this article on breeding clownfishes, if you’re interested in trying that


Watch this video to dive deeper into caring for the maroon clownfish


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Wilkerson, Joyce D. Clownfishes: A Guide to Their Captive Care, Breeding & Natural History. T.F.H Publications. 2001. Neptune City, NJ.

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