Maroon Clownfish

The Maroon Clownfish is the largest species of anemonefish, a group of damselfishes (family Pomacentridae) famed for their symbiotic partnership with sea anemones. Native to the Indo-West Pacific, it lives almost exclusively with the bubble-tip anemone, forming small social groups dominated by a single breeding female. It is one of the most recognizable reef fish due to its bold maroon coloration and prominent bars, and it is widely bred in captivity for the aquarium trade. Populations remain stable across its natural range, though localized reef degradation and overcollection can pressure wild stocks. Its striking looks and unusually feisty temperament, especially in females, make it a standout among clownfish species on Indo-Pacific reefs.

• Body: Deep, laterally compressed oval shape typical of anemonefish
• Color: Dark maroon to near-black background, more brownish-orange in males
• Markings: One to three bright white or pale gold vertical bars (head, mid-body, tail base); bar count and thickness vary by region
• Distinctive feature: A sharp spine projecting from the cheek below the eye, unique among clownfish and the source of the species name
• Size: Females notably larger and bulkier (up to 17 cm) than males Distinguished from other clownfish by its greater size, spiny cheek, and more elongated bar pattern.

Maroon Clownfish inhabit shallow tropical coral reefs and lagoons throughout the Indo-West Pacific, from Indonesia and Thailand to the Great Barrier Reef and the western Pacific islands. They are typically found at depths of 1-12 meters in clear, warm water around 24-28°C. This species is closely tied to a single anemone host species, the bubble-tip anemone (Entacmaea quadricolor), and rarely strays far from its adopted host. Reef flats, slopes, and lagoon patch reefs with healthy anemone populations provide ideal habitat. Because of this strong host dependency, local abundance is closely linked to the health and availability of bubble-tip anemones on a given reef.

Maroon Clownfish live in small hierarchical groups anchored to one anemone: a single large dominant female, a smaller breeding male, and several non-breeding juveniles. All individuals begin life as males and can change sex to female if the dominant female is lost, a trait shared by all anemonefish. Females are notably territorial and will aggressively chase off intruders, including divers, to protect their anemone and eggs. Pairs spawn repeatedly near the base of the host anemone, with the male guarding and fanning the eggs until hatching. The species feeds opportunistically on plankton, algae, and small invertebrates, while gaining protection from the anemone's stinging tentacles, to which it is immune due to a protective mucus coat.