How big does Maroon Clownfish get?

Maroon Clownfish reaches an adult standard length of 13–17 cm (excluding the caudal fin). Size the tank for that, not for the juvenile you bring home — the difference is often several times over, and upgrading later costs more than buying once.

What water does Maroon Clownfish need?

24–27 °C, pH 8.1–8.4, 7–12 dGH, 7–9 dKH, specific gravity 1.023–1.026. That is only 3 °C wide, so stability matters more than hitting a particular number.

What is the smallest tank for Maroon Clownfish?

At least 120 L, and no shorter than 90 cm. That is the floor for long-term keeping, not for short-term survival: volume buys water stability and length buys swimming room, and neither substitutes for the other. It is not a schooling fish, so a single specimen or a pair is fine.

What is Maroon Clownfish like to keep?

Temperament: aggressive. Difficulty: moderate. It occupies the middle and is omnivore. Reef safety is "Reef safe".

Can Maroon Clownfish be kept with its most common tank mate?

The checker returns "Not recommended together". Maroon Clownfish and Ocellaris Clownfish is a recorded conflict in this atlas. Predation, territorial fighting or conspecific aggression is the usual outcome, and a bigger tank does not change it.

G-01 / 46Marine

Maroon Clownfish番茄小丑

Premnas biaculeatus · Pomacentridae

The largest and most aggressive clownfish; deep maroon with thin gold bands.

Illustration to come

G-01 / 46 · Maroon Clownfish Premnas biaculeatus

SpecificationsFish atlas

Name: 番茄小丑
Scientific name: Premnas biaculeatus
Family: Pomacentridae
Origin: Indo-Pacific coral reefs
Adult size: 13–17 cm
Temperament: Aggressive
Diet: Omnivore
Water level: Middle
Level: Moderate
Min. tank: 120 L
Min. length: 90 cm
Reef safe: Reef safe

Water requirementsMarine

Temp.24–27 °C

pH8.1–8.4

Salinity1.023–1.026 SG

Alkalinity7–9 dKH

Units: temperature in °C, hardness in German degrees (dGH / dKH), marine salinity as specific gravity at 25 °C, volume in litres. These are the values recorded for the species and do not follow the site unit switcher.

Keeping notes

1Conspecific aggression is severe; keep one, or a proven male-female pair.
2Females reach about 15 cm and need real territory; in small tanks they chase everything.
3Add it last so other fish can establish territories first.
4Reef safe, but it declares a wide no-go zone around its anemone.
5Heavy feeder; watch uneaten food fouling the water, especially in small tanks.

Check a tank mate

Jump straight to the verdict for Maroon Clownfish against this one — no need to pick it again.

Frequently asked questions

How big does Maroon Clownfish get?: Maroon Clownfish reaches an adult standard length of 13–17 cm (excluding the caudal fin). Size the tank for that, not for the juvenile you bring home — the difference is often several times over, and upgrading later costs more than buying once.
What water does Maroon Clownfish need?: 24–27 °C, pH 8.1–8.4, 7–12 dGH, 7–9 dKH, specific gravity 1.023–1.026. That is only 3 °C wide, so stability matters more than hitting a particular number.
What is the smallest tank for Maroon Clownfish?: At least 120 L, and no shorter than 90 cm. That is the floor for long-term keeping, not for short-term survival: volume buys water stability and length buys swimming room, and neither substitutes for the other. It is not a schooling fish, so a single specimen or a pair is fine.
What is Maroon Clownfish like to keep?: Temperament: aggressive. Difficulty: moderate. It occupies the middle and is omnivore. Reef safety is "Reef safe".
Can Maroon Clownfish be kept with its most common tank mate?: The checker returns "Not recommended together". Maroon Clownfish and Ocellaris Clownfish is a recorded conflict in this atlas. Predation, territorial fighting or conspecific aggression is the usual outcome, and a bigger tank does not change it.