Maroon clownfish (Amphiprion biaculeatus) is one of the most popular and iconic reef tank fish. They consistently rank in the top 20 saltwater fish species with their awesome maroon red coloration and the iconic white or gold stripes.
A few “designer” varieties of this fish are also available from ORA Farms under the names lightning maroon and gold striped, though they command higher prices than the original.
But there are some quirks to this species, and if you aren’t aware of them, you could find yourself regretting your impulse purchase.
Table of Contents: Maroon Clownfish
Quick Facts
- Common Names: Maroon clownfish, Spinecheek, Gold striped maroon (designer), Lightning maroon (designer)
- Scientific Name: Amphiprion biaculeatus (Originally Premnas biaculeatus)
- Max Size: ~6 inches (15 cm) for a large female, about half that for males
- Lifespan: ~3-7 years is typical, ~15 or more for highly successful aquarists
- Tank Size: 55 gallons (208L) or larger
- Care Level: Easy, suitable for beginners (except in regards to aggression)
- Reef Safe?: Yes
- Aggression Level: Aggressive, especially when paired and spawning
Description of the Maroon Clownfish
When it comes to size, maroon clownfish come out on top (at least among clownfish). Females can reach an impressive 7 inches (17.7cm) in the wild, dwarfing their male partners. And when they reach maturity? It comes with a notoriously bad attitude. Even in bonded pairs, if she decides to have a bad day (or week or month), she can turn on the male and harass him—sometimes to the point of death!
No one can deny these clownfish are gorgeous to behold, though. Unlike the orange shade most people think of when you mention “clownfish,” maroons have deep red scales between those three white stripes you expect to see. They also have a spine within their cheeks—something you won’t find in the rest of the clownfish family.
It’s where that other common name—spinecheek—comes from. (Okay, so not everyone uses imagination for names)
Speaking of names, the maroon clownfish underwent an overhaul regarding their scientific name in May 2021. Scientists have always argued that they share plenty of qualities with the Percula Complex of clownfish (this is the group the ocellaris clownfish—one of the most recognized in the group—belongs to).
Cross-breeding between maroon and common clownfish happens now and then. The resulting fry develop orange-red colors, and they’re sold as designer varieties under the name blood orange clownfish.
And after the ENDLESS genetic debate, they concluded that the Premnas genus wasn’t as unique as originally believed. So maroon clownfish received the shiny new scientific name of Amphiprion biaculeatus—at least until the next round of questions and fighting erupts.
Maroon Clownfish Lifespan
Maroon clownfish tend to live about 3-7 years, on average. Now, before you get excited, keep in mind that your individual fish may not live an average life. It could die much older (some saltwater species live upwards of 17-20 years) or younger. That 3-7 year range is a rough estimate of what to expect from a healthy “typical” experience, based on ideal living conditions.
- Key factors affecting lifespan: Water quality, stable parameters, a varied and nutritious diet, compatible tankmates, and low chronic stress are all essential for longevity.
- Common causes of premature death: Poor acclimation, persistent aggression (especially in pairs or with inappropriate tankmates), inadequate diet, and disease outbreaks can all shorten lifespan.
- Tips for maximizing lifespan: Perform regular tank maintenance, offer a varied diet, monitor for early signs of stress or disease, and avoid overcrowding or incompatible species.
Creating the Ideal Maroon World
Maroons are hardy fish and tolerant of moderate changes in water chemistry and parameters. Try to keep water in stable conditions to provide the best and most healthy environment, though. As for the tank size, a single maroon clownfish requires at least 30 gallons (114L) of living space. And if you have aspirations to keep a pair, you’ll need a tank that is 55 gallons (208L) or larger.
Why tank size and aquascaping matter: Maroon clownfish are highly territorial, and their aggression is amplified in confined spaces. Inadequate tank size or poor aquascaping can lead to chronic stress, frequent fighting, injury, or even death—especially in pairs or with tankmates. A larger tank provides more territory, reducing the likelihood of constant confrontations.
Designing your tank for maroon clownfish:
- Use live rock to create multiple caves, crevices, and hiding spots. This allows subordinate fish (including the male in a pair) to escape aggression and reduces line-of-sight, which helps break up territories.
- Visual barriers, such as rockwork or tall coral placements, help prevent fish from constantly seeing each other, which can lower stress and aggression.
- Tank shape matters: Long tanks are generally better than tall tanks for maroon clownfish, as they provide more horizontal territory and allow for more distinct zones.
- Monitor for warning signs of territorial stress, such as persistent chasing, refusal to eat, or visible injuries.
Regardless of the size of your aquarium, once you add your maroon clownfish, they consider the entire tank THEIR territory. And they WILL defend it! If you’re planning to keep a pair, be sure to provide them with space and ample hiding places within the live rock.
This will allow the male to escape the aggression of the female. Otherwise, you may end up with one lonely female. (Well, perhaps not LONELY, but she will end up alone)
Maroon Clownfish Diet
Maroon clownfish are not picky fish, making them easy to feed. In the wild, they mainly eat zooplankton. In the home aquarium, they’ll eat just about anything you choose to offer them:
- Flakes
- Pellets
- Mysis shrimp
- Brine shrimp
- Black worms
Why dietary variety matters: A varied diet ensures maroon clownfish receive all the micronutrients, vitamins, and pigments they need for optimal health, coloration, and immune function. Feeding only one type of food can lead to nutritional deficiencies, faded colors, suppressed immunity, and poor breeding success.
Practical feeding strategy: Rotate between high-quality flakes, pellets, and frozen foods. Supplement with occasional live foods for enrichment. Aim to feed your fish 2-3 times a day, if possible. You CAN keep them relatively healthy with a single, sufficiently sized feeding if life gets in the way. It isn’t the most ideal situation in the world, but maroons are some of the hardier members of their group, and they’ll handle the change without a problem.
Keep an eye on their temperament, though—something we’re going to discuss now.
Maroon Clownfish Aggression
Maroon clownfish are one of the most aggressive and territorial species of clownfish. They may seem like great beginner saltwater fish at first, but they are not.
Why are maroon clownfish so aggressive? Their aggression is rooted in natural behaviors: defending territory, competing for resources, and establishing social dominance. This is especially pronounced during breeding or when new tankmates are introduced. The female is almost always the dominant fish, and her aggression can escalate rapidly if she feels her territory or mate is threatened.
Warning signs and escalation:
- Chasing or persistent following of other fish
- Nipping or biting, especially at fins
- Excluding tankmates from food or hiding spots
- Visible injuries or torn fins
- Chronic stress behaviors (hiding, loss of appetite, faded coloration)
Managing aggression:
- Tank addition order: Add maroon clownfish last, after other tankmates have established territories.
- Rearrange rockwork: If aggression flares up, temporarily rearranging the aquascape can disrupt established territories and reduce hostility.
- Acclimation boxes: Use a breeder or acclimation box to introduce new fish or potential mates, allowing visual contact without risk of injury.
- Separation: In severe cases, temporary or permanent separation may be necessary. Chronic aggression that leads to injury or starvation often requires rehoming one of the fish.
Aggression is one of the biggest troubles faced by aquarists that take on maroon clownfish. Providing space for everyone in your display tank helps, but you also want to think through the order in which you add all of your species. Maroons that go into the “pool” last will remain calmer as they won’t view the entire tank as their property.
With all that said, they will likely leave your cleaner shrimp and other invertebrates alone.
Pairing Maroons and Sea Anemones
Clownfish and sea anemones are like peanut butter and jelly: you simply don’t see one without the other. The symbiotic relationship provides protection to the fish, while the anemones benefit from pest control from the fish. As each species gains something positive, it’s considered a form of commensalism.
Maroon clownfish are naturally adapted to host with certain anemone species—primarily the bubble tip anemone (Entacmaea quadricolor). This preference is likely due to evolutionary adaptation and chemical cues that allow maroons to recognize and acclimate to their host anemones. While they may occasionally accept other species, such as:
- Corkscrew tentacle (Macrodactyla doreensis)
- Adhesive sea anemone (Cryptodendrum adhaesivum)
- Delicate sea anemone (Heteractis malu)
…successful hosting is most reliable with bubble tip anemones.
A Word of Caution About Sea Anemones
Many new aquarium owners get their first tank courtesy of seeing clownfish (either snorkeling, diving, or on a trip to the aquarium). They imagine themselves with a clownfish pair, swimming in and around an anemone.
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).
Husbandry challenges: Anemones require high-intensity lighting, stable water parameters, and mature tanks (generally at least 6-12 months old). They are sensitive to changes in water quality and can move around the tank, potentially stinging corals or other livestock. Chemical warfare between anemones and corals is also a risk in mixed-reef tanks.
When to add an anemone? Only consider adding an anemone if your tank is mature, stable, and you are confident in your ability to maintain pristine water quality and strong lighting. If you have your heart set on an anemone for your clownfish, check out the bubble tip anemone (Entacmaea quadricolor). They do relatively well in captivity and are often fragged by aquarists once they get large enough. They are also one of the few species that naturally host maroon clownfish in the wild.
However, clownfish DON’T need an anemone to remain happy and healthy in your tank. In fact, most people do not keep anemones in their tanks, and their maroon clownfish do fine. As the fish aren’t at risk from predators, they don’t need to rely on the protections afforded by the anemone.
Should You Keep Maroon Clownfish in Pairs?
You know you need to keep an eye on the aggression level with your maroon clownfish—especially in the female. And you often see pairs in the wild. So you probably feel obligated to purchase and house a mated couple, assuming the risks. But you don’t have to keep maroon clownfish as pairs. The choice is up to you.
Understanding clownfish social structure: In the wild, clownfish live in small groups with a strict hierarchy: a dominant female, a subordinate male, and several non-breeding juveniles. Only the dominant pair breeds. All clownfish are protandrous hermaphrodites—starting life as males, with the largest and most dominant individual becoming female.
Risks of forced pairing: Introducing two adult maroon clownfish, or two of similar size, often leads to violent fights and sometimes death. The safest way to establish a pair is to introduce a significantly larger fish with a much smaller juvenile. This allows the dominance hierarchy to form quickly, minimizing prolonged aggression.
Tips for safe pairing:
- Pair a large maroon clownfish (likely female or transitioning) with a much smaller juvenile.
- Use an acclimation box to allow visual contact before direct introduction.
- Monitor closely for excessive aggression—if the smaller fish is relentlessly attacked, be prepared to separate them.
- Keeping a single maroon clownfish eliminates pairing aggression but means you won’t see their courtship and spawning behaviors.
Pairing and Breeding
If you can establish a pair (without losing the male) and provide them with enough space, maroon clownfish are moderately easy to breed. A healthy, well-fed pair spawns on a routine interval: every 4-6 weeks. Although individual pairs will establish their own pattern.
Courtship takes place about 3-5 days before the actual spawning. As they begin their courtship ritual, the maroon pair will clean a rocky area near their chosen anemone to provide an adequate place for the eggs to adhere to. (If you don’t have an anemone, they’ll choose another spot—so don’t panic)
They display an intricate “dance,” including leaning towards each other, touching various parts of their bodies, and head shaking.
Once laid, it’s fascinating to watch the parents (mostly the male) tend to the eggs. The behavior’s similar to a freshwater cichlid (not one of the mouth-brooders, though). The eggs and larvae are large (relative to most saltwater fish), so they come out on the easier end of the spectrum in terms of ease of feeding after hatching. The eggs hatch in about a week.
Combining Clownfish Varieties
Once you’re hooked on clownfish, it’s tempting to envision an entire tank filled with different species and varieties, with their various colors and patterns. And it DOES sound amazing. But you need to refrain. You CANNOT keep maroon clownfish in the same tank as any other clownfish species!
Why can’t you mix clownfish? Maroon clownfish are especially intolerant of other clownfish due to their size, territoriality, and aggression. They will view other clownfish—regardless of species or genus—as direct competitors, often resulting in relentless aggression and, in most home aquariums, the death of the less dominant fish.
Are there any exceptions? In extremely large tanks (hundreds of gallons or more) or public aquariums with abundant space and territory breaks, it may be possible to keep multiple clownfish species. However, this is not practical or advisable for most hobbyists. Attempting to mix clownfish in typical home aquariums almost always ends badly.
Designer Maroon Clownfish
As I touched on in the introduction, you can come across a couple of designer maroon clownfish out there these days. They’re newcomers to the industry but already every bit as popular as the original. And while you’ll need to pay a little extra for the genetic manipulation of the designs, they’re not that tricky to locate. The designer varieties available: the gold striped maroon clownfish and the lightning maroon clownfish.
Gold Stripe vs. White Stripe
The first designer maroon clownfish I was aware of was the gold striped maroon clownfish. (As you might have noticed in the photos throughout this article, white and gold striped varieties appear interchangeably). All maroon clownfish are born with white stripes. But in the gold stripe design, they turn yellow as they mature (usually more than a year later).
Females usually turn a much darker red than the males, allowing the stripes to pop out even more dramatically (as you can see in the photo below).
Gold stripe maroon clownfish come in a touch smaller than the original species, though they’re still impressive in a reef tank. You’ll see them reach around 6 inches (15.2cm) at full size.
Some people may not consider these clownfish a designer option anymore because of how long they’ve been available. They’re a trendy color variant, all the same. And if you want to add a touch more to your tank, you may want to look for them.
Lightning Maroon Clownfish
The lightning maroon clownfish is a designer variant that took the hobby by storm (pun intended, of course). They get their name because their stripes have an erratic, chain, or electric pattern to them. The “lightning” part of the name came from the fact that many people felt the stripes looked like streaks of lightning bolts down the fish’s bodies. And no two fish ever look the same!
As the fish mature, the patterns grow more intense, standing out against that stunning maroon color.
Everything else about the care and aquarium conditions applies to them the same. And these maroon clownfish come out to the same size as the gold stripe variety. They’re on the rare side if you’re looking for them, and those unique patterns make them more expensive.
But you can’t argue that lightning maroon clownfish make for stunning display tank additions!
For More Information
Who doesn’t want to continue learning about maroon clownfish? If you’re still on the fence, this can help you make a final decision.
Watch this YouTube video to dive deeper into caring for maroon clownfish:
Check out this article on breeding clownfish if you’re interested in trying that (Hint: this works for any clownfish species).
Conclusions
- Maroon clownfish are among the most territorial and aggressive clownfish species—careful planning is essential.
- They require a spacious tank (at least 30 gallons for one, 55+ gallons for a pair) with thoughtful aquascaping to minimize aggression.
- Anemones are not required for their health or happiness, and keeping anemones adds significant complexity.
- If you are new to clownfish, consider starting with a less aggressive species such as ocellaris, percula, or tomato clownfish instead.
References:
- Wilkerson, Joyce D. Clownfishes: A Guide to Their Captive Care, Breeding & Natural History. T.F.H Publications. 2001. Neptune City, NJ.