Species description

Care, breeding and tankmates

Fish profile

Temperament

Aggressive

The Maroon Clownfish is notoriously bold, fearless, and exceptionally aggressive, often attacking the aquarist's hand during maintenance. It will boldly charge and bite any fish, regardless of size, that encroaches upon its heavily guarded territory. Due to this formidable temperament, they should be introduced last into an established, semi-aggressive community.

Diet

Omnivore

In their natural reef environment, Maroon Clownfish are highly adaptable omnivores feeding on zooplankton and benthic algae. In the aquarium, they eagerly accept a diverse diet of high-quality marine flakes, pellets, and frozen mysis shrimp. Supplementing with spirulina or other marine algae preparations ensures strong coloration and immune health.

Sex ratio

Group

Because of their extreme conspecific aggression, they must only be kept as a single specimen or a bonded male-female pair. Introducing two females or attempting to form a harem will immediately trigger lethal aggression. A pair should be formed by purchasing a significantly larger female and a much smaller male simultaneously.

Feeding frequency

Twice daily

To support their high energy levels, it is highly recommended to feed them small amounts two times daily. Providing regular, balanced meals helps reduce extreme territorial aggression towards other tank mates. Overfeeding should be avoided to maintain pristine water quality and prevent unnecessary algae outbreaks.

Bioload

Medium

The Maroon Clownfish produces a moderate bioload that is easily managed by standard marine filtration systems. While robust, they require stable water parameters and benefit from regular, routine water changes. Employing a good quality protein skimmer ensures their environment remains clean and free of dissolved organics.

Flow

Strong

They prefer moderate, varied water flow that simulates the dynamic currents found around natural anemone habitats. While they are strong swimmers, excessively harsh, unidirectional flow can make it difficult for them to comfortably hover near their host. A wavemaker providing broad, gentle, yet robust circulation is ideal.

Jump risk

No

Reproduction

Oviparous

Maroon Clownfish are readily bred in captivity, strongly adhering to a structured monogamous pairing. They are protandrous hermaphrodites; the largest, most dominant fish becomes female, while the subordinate remains male. The pair diligently cleans a rock surface near their anemone to deposit hundreds of eggs, aggressively guarding them until hatching.

Compatibility & tankmates

Territorial

This is widely considered the most aggressively territorial of all clownfish species, fiercely defending its host anemone and surrounding area. They must be kept with other highly robust, assertive fish like large damsels, tangs, or dottybacks. Mixing them with peaceful, timid species or other clownfish species almost always results in severe injury or death.

Tank level

All levels

Maroon Clownfish primarily occupy the middle to lower levels of the aquarium, strongly anchoring themselves to a chosen host anemone or rock structure. They rarely stray far from their established territory, vigorously defending it against all intruders. Providing a large Entacmaea quadricolor (Bubble Tip Anemone) highly satisfies their natural instinct for shelter.