The Maroon Clownfish (Premnas biaculeatus) is the largest clownfish species and one of the most aggressive. Single-pair only, 50+ gallons.

  • Min tank: 50 gallons
  • Diet: Omnivore
  • Reef safe: Yes
  • Difficulty: Easy-Moderate

Related reef reading

May 10, 2026

Brittle Star

The Brittle Star (Ophioderma spp.) is the reef's nocturnal cleanup specialist. Hides in rockwork by day and emerges at night to consume…

May 10, 2026

Scarlet Hermit Crab

The Scarlet Hermit Crab (Paguristes cadenati) is the most reef-safe hermit crab in the hobby. Stays small, focuses on algae and detritus,…

May 10, 2026

Astrea Snail

Astrea Snails (Astraea tecta) are workhorse algae grazers and a CUC standard. Their one weakness: they cannot right themselves when flipped onto…

Reef tools mentioned in this article

🪸

Reef Tank Match Quiz

Find the right reef archetype for your space and budget.

Start quiz →
⚙️

Reef Equipment Planner

Generate a complete equipment shortlist for your build.

Open planner →
🧪

Water Parameter Tracker

Log every reading. Catch problems before livestock notice.

Open tracker →