Species, Batfish, Information, Saltwater fish

Maroon Clownfish (Premnas biaculeatus)

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by Jason Matthews



Maroon Clownfish are a fascinating species of saltwater fish that make a great addition to any home aquarium. With their bright colors, playful nature, and toughness, these fish are sure to catch the eye of any beginner or experienced fish owner. 

In this article, we will delve into the world of Maroon Clownfish and explore all there is to know about this incredible species, from its origin to its behavior, tank conditions, and everything in between. Whether you are a seasoned aquarium owner or just starting, you will learn something new about these amazing creatures and gain a deeper appreciation for them. So, without further ado, let us dive into the world of Maroon Clownfish!


Scientific Name: Premnas biaculeatus
Common Names: Maroon Clownfish
Life Expectancy: 5-10 years
Adult Size: Up to 6 inches


Care LevelModerate
Tank LevelMiddle to bottom
Minimum Tank Size30 gallons
Water pH8.1-8.4
Water Temperature72-78°F
Water Hardness8-12 dKH
LightingModerate to high
Tank MatesPeaceful and larger fish

Fun Fact Corner

Did you know that Maroon Clownfish have a unique and fascinating relationship with anemones? These fish form a symbiotic association with specific anemone species. The clownfish protects the anemones by driving away potential predators, while the anemones protect the clownfish. This mutualistic relationship is a prime example of the incredible biodiversity found in the ocean and a testament to these remarkable creatures’ adaptability and survival skills.


The Maroon Clownfish, also known as the Spinecheek Anemonefish, is native to the waters of the Indo-Pacific region, from the Red Sea to the Great Barrier Reef. This species is well-suited to living in coral reefs, where it is often found to live close to anemones, especially sea ones.

The clownfish and sea anemones help each other out. The clownfish guard the sea anemones, and the sea anemones give the clownfish a safe place to live. 

Appearance & Size

Maroon Clownfish are easily recognizable by their distinctive appearance. This species has a bright, deep maroon-red body with white lines running vertically along it. Its fins often have white edges, giving it a bold and striking look that sets it apart from other fish. 

Maroon Clownfish are also known for their big, round, black eyes. These eyes give them good vision and help them find their way through the often dark waters of coral reefs. They also have small mouths that allow them to eat small things like brine shrimp or plankton. 

Maroon Clownfish are medium-sized, and adults usually grow 5 to 6 inches long. This makes them a suitable size for most home aquariums, as they do not require a lot of swimming space and can thrive in smaller tanks.


Maroon Clownfish are sexually dichromatic, meaning there are distinct differences in appearance between males and females. Male Maroon Clownfish are typically larger than females and have a more dominant and aggressive personality. Most female Maroon Clownfish are more petite and less outgoing than males. 


Maroon Clownfish are known for their dynamic and playful behavior, making them a joy to observe in the aquarium. They are bold and like to get close to their owners and other fish in the tank. 

In the wild, Maroon Clownfish use their strong personalities to keep strangers out of their sea anemone homes and get food for themselves and their young. 

Maroon Clownfish in an aquarium can be taught to eat out of their owner’s hand, and they often do other playful things like play with toys or check out new things in their surroundings.


When choosing tankmates for your Maroon Clownfish, it is important to consider the other fish’s size, behavior, and compatibility in the aquarium. Maroon Clownfish can be aggressive and territorial, so it is important to choose peaceful tankmates that are unlikely to provoke conflict. Additionally, Maroon Clownfish should not be kept with fish likely to consume them or their eggs, such as large predatory fish or wrasses.

Here are a few recommended tankmates for Maroon Clownfish:

  • Damselfish: These small, brightly-colored fish are peaceful and less likely to provoke conflict with Maroon Clownfish.
  • Cardinalfish: These small, peaceful fish are nocturnal and are unlikely to compete with Maroon Clownfish for food.
  • Gobies: These small, peaceful fish are bottom-dwellers and are unlikely to compete with Maroon Clownfish for food or territory.
  • Royal Gramma: This small, brightly-colored fish is peaceful and is unlikely to compete with Maroon Clownfish for food or territory.

Tank conditions

Maroon Clownfish are hardy and adaptable fish that thrive in various tank conditions. To ensure their health and well-being, providing them with an appropriate environment that closely mimics their natural habitat is important. 

For a single pair of Maroon Clownfish, a tank of at least 30 gallons is suggested. It is also important to keep the temperature stable between 72°F and 78°F, the pH level between 8.1 and 8.4, and the specific gravity between 1.020 and 1.025. 

It is also important to give Maroon Clownfish a lot of places to hide, like caves, rocks, and natural or fake plants, because they are territorial and may get aggressive if they think their area is being threatened. 


The diet of Maroon Clownfish consists primarily of meaty foods such as frozen or dried shrimp, krill, and squid. They will also eat pellets or frozen or dry flakes, but it is important to ensure that these foods are good quality and made for marine fish. 

It is best to feed Maroon Clownfish 2-3 times a day in small amounts to ensure they get a healthy diet and keep them from getting too much food and causing water quality problems.

It is important to avoid over-feeding Maroon Clownfish as this can lead to health problems and poor water quality. Keeping a close eye on their feeding habits and adjusting their diet as needed can help to ensure that your Maroon Clownfish stays healthy and active.


Breeding Maroon Clownfish can be a rewarding experience for experienced aquarists, but it requires a carefully controlled and monitored environment. This species is a progressive hermaphrodite, meaning that over time, the dominant fish in a group will switch from female to male. Maroon Clownfish form pairs in the wild and have their young in a safe place like an anemone.

A breeding tank with appropriate water conditions and plenty of hiding places should be provided to breed Maroon Clownfish in captivity. The temperature should be kept between 74-82°F and the specific gravity between 1.020-1.025. Additionally, the tank should have a well-established and stable cycle with low levels of nitrates and phosphates.

A pair of Maroon Clownfish will usually lay their eggs on a flat surface, like a rock or the tank glass, and the male will watch over the eggs until they hatch. Once the eggs hatch, the fry should eat rotifers and artemia for the first few weeks. After that, they can start eating newly hatched brine shrimp and fry food sold in store


The Maroon Clownfish is a hardy species and can withstand minor diseases and conditions, but it is important to maintain proper tank conditions to prevent outbreaks. 

Some common diseases affecting the Maroon Clownfish include Marine Ich, Marine Velvet, and fin rot. It’s important to monitor the fish’s behavior and appearance and to take action if you notice any unusual symptoms. 

Regular water changes and proper filtration can also help prevent diseases. If you suspect your fish is sick, it is best to isolate it and consult a veterinarian specializing in aquarium fish. 


Jason Matthews

My name is Jason Matthews, and welcome to my website. When other kids were bragging about how their dog could sit and roll over, I was bragging about my latest Betta Fish and the cool sea castle I just added to his aquarium. 

Jason aquariume

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