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Melanochromis auratus, also called Golden Auratus, is an African cichlid from Lake Malawi belonging to the mbuna group. Very popular in the aquarium hobby, it is known for its yellow, black, and blue contrast, as well as its strongly territorial behavior. This species is best kept in a spacious, rocky aquarium with alkaline, well-filtered water and plenty of hiding places. Males and females display very different colors, making the sexual dimorphism especially easy to observe in adults. Its reputation as a hardy fish should not obscure its aggression toward conspecifics.

General species description

Melanochromis auratus is a Lake Malawi mbuna known for its active behavior and close association with rocky habitats. It grazes surfaces covered with algae and small organisms while defending an area around the rocks. In an aquarium, it remains active during the day and constantly explores the décor. Adult males can become highly territorial, especially during breeding. Keeping one male with several females helps distribute the pressure exerted by the dominant male. Despite its modest size, this is not a generally peaceful community fish; it is best kept with mbuna of similar size and temperament. Efficient filtration and stable water conditions are essential for maintaining good health.

Geographic origin and biotope

Melanochromis auratus comes from Lake Malawi in East Africa, with a distribution associated with rocky areas of Malawi, Mozambique, and Tanzania. Reference countries: Malawi, Mozambique, and Tanzania. It inhabits rocky shorelines where boulders create cracks, shelters, and territorial boundaries. Light is generally strong in shallow areas, encouraging algae growth on the stones. The water is clear, mineral-rich, alkaline, and well oxygenated. The bottom consists of rocks, gravel, and sand collected between the boulders, with little true aquatic vegetation. To recreate this environment, use stable, non-sharp stones and leave an open swimming area at the front of the aquarium.

Precise location and local name

The species is associated with the rocky shores of southern Lake Malawi, particularly around the Nankumba Peninsula and Cape Maclear. These habitats include cliffs, rock piles, and submerged boulders that provide numerous shelters. The term mbuna is a commonly used Chichewa name for rock-dwelling cichlids from Lake Malawi; it therefore does not refer only to this species. In the aquarium trade, Golden Auratus is also widely used, although the golden coloration is mainly seen in females and juveniles. Adult males are usually darker, which can create confusion when fish are sold under a common name.

Appearance and physical characteristics

The sexual dimorphism of Melanochromis auratus is striking. Females and juveniles are generally golden yellow with black horizontal bands, while adult males usually become dark brown to black, with pale blue or metallic blue bands. The body is elongated, laterally compressed, and adapted for movement among rocks. The dorsal and anal fins are relatively long, and the dorsal fin may show a contrasting edge. Maximum adult size is approximately 11 to 12 cm, depending on sex and rearing conditions. Its terminal mouth and grazing teeth allow it to scrape algae from hard surfaces. Dominated individuals may become paler or temporarily alter their coloration.

General diet

Melanochromis auratus is mainly herbivorous and feeds on aufwuchs. In nature, it grazes the algal film and microorganisms covering rocks while also consuming small animal particles. In aquariums, its diet should consist mainly of flakes, pellets, and wafers rich in plant matter, supplemented with spirulina-based foods. Small portions offered two or three times daily are preferable to one very large meal. Foods very high in animal protein, such as preparations dominated by shrimp or worms, should remain occasional because they may contribute to digestive problems in mbuna. Variety is useful, but the priority should remain a regular, plant-based diet. Blanched vegetables may be offered from time to time.

Essential data

• Name of river of origin: Lake Malawi; the species is not associated with a single river of origin.
• Local name used: Mbuna.
• Origin of the scientific name: Melanochromis is the genus name assigned to this group of African cichlids; auratus refers to the golden coloration.
• Etymology of the full name: Melanochromis approximately means “black-colored”; auratus means “golden” or “covered with gold.”
• Common/vernacular names: Golden Auratus, Golden Auratus cichlid, mbuna auratus.
• Family: Cichlidae.
• Subfamily: Pseudocrenilabrinae.
• Name pronunciation: mel-ann-oh-KROH-miss - aw-RAH-tuss.
• Discovery: George Albert Boulenger, 1897.
• Maximum adult size: Approximately 11 to 12 cm.
• Water temperature and pH: 24 to 28 °C; pH 7.6 to 8.6.
• Waterway appearance and surrounding vegetation: Rocky lake shoreline, clear alkaline water, algae-covered stones, and limited aquatic vegetation.
• Typical tankmates: Labidochromis caeruleus Nkhata Bay, Pseudotropheus socolofi, Cynotilapia afra, Metriaclima estherae.
• Temperament and behavior: Active, territorial, and aggressive, especially among males; maternal mouthbrooding.
• Water depth: Shallow shoreline habitat, generally only a few meters deep.
• Sexual dimorphism: Golden yellow, black-banded females; dark adult males with pale blue bands.
• Bottom structure and flow: Rocks, boulders, gravel, and sand between stones; well-oxygenated lake water without pronounced river current.

In your aquarium

To keep Melanochromis auratus successfully, provide a spacious aquarium with many rocks placed securely before adding the substrate, creating territories and shelters. Alkaline, warm, stable water combined with strong filtration supports its health. The population should be planned around its hierarchy: one male with several females is generally preferable to several males in a small aquarium. Avoid peaceful tankmates or fish with long fins. A mostly plant-based diet and regular water changes complete the basic requirements for long-term care. With these precautions, this mbuna remains a colorful, active fish that is highly interesting to observe.