CheckMyFishTank

Maroon Clownfish care

Premnas biaculeatus · Saltwater · Intermediate level care

Maroon Clownfish, painted illustration

A striking, large clownfish that is very bold and aggressive.

Smallest tank55 gallons
Adult size6 inches
Temperature76 to 80°F
pH8.1 to 8.4
GroupOne per tank
TemperamentAggressive
SwimsMiddle of the tank
Lives8 to 12 years
Watch for: Very aggressive as it ages, so it is not for small tanks or peaceful setups.

Feeding

Twice a day. A small pinch they finish in about 2 minutes, a little more for bigger fish. Marine pellets, mysis, frozen brine shrimp.

Claims a territory and guards it.

Good tank mates

Fish that pass every check with Maroon Clownfish in a 110 gallon tank: same water, overlapping temperature, nobody gets eaten and no bullies.

Bicolor BlennyBlue Devil DamselfishClark's ClownfishDomino DamselfishMidas BlennyOcellaris ClownfishOrchid DottybackPercula ClownfishRoyal GrammaSix Line Wrasse

Do not mix with

  • Green Chromis: Maroon Clownfish is aggressive and will bully peaceful Green Chromis.
  • Firefish Goby: Maroon Clownfish is aggressive and will bully peaceful Firefish Goby.
  • Purple Firefish: Maroon Clownfish is aggressive and will bully peaceful Purple Firefish.
  • Banggai Cardinalfish: Maroon Clownfish is aggressive and will bully peaceful Banggai Cardinalfish.
  • Pajama Cardinalfish: Maroon Clownfish is aggressive and will bully peaceful Pajama Cardinalfish.
  • Yellow Watchman Goby: Maroon Clownfish is aggressive and will bully peaceful Yellow Watchman Goby.
  • Neon Goby: Maroon Clownfish is aggressive and will bully peaceful Neon Goby.
  • Yellow Clown Goby: Maroon Clownfish is aggressive and will bully peaceful Yellow Clown Goby.

Questions

What size tank does a Maroon Clownfish need?

At least 55 gallons. Adults grow to about 6 inches, so plan for the adult size, not the size at the store.

What temperature does a Maroon Clownfish like?

76 to 80 degrees Fahrenheit, with a pH of about 8.1 to 8.4. A steady temperature matters more than hitting one exact number.

How many Maroon Clownfish should I keep together?

Keep only one. Maroon Clownfish fight their own kind.

What do Maroon Clownfish eat?

Marine pellets, mysis, frozen brine shrimp. Feed twice a day: a small pinch they finish in about 2 minutes, a little more for bigger fish.

Sources

Checked against these sources on 2026-11-10. When sources disagree we use the safer number.