Barred Cichlid (Mesonauta festivus) — 7-9cm

Overview

The Barred Cichlid (Mesonauta festivus), also known as the Festive Cichlid or Flag Cichlid, is a graceful South American species prized for its elegant finnage, striking barred patterning, and moderately peaceful temperament. Native to the river basins of Brazil, Peru, Paraguay, and Bolivia, this cichlid thrives in soft, slightly acidic water and rewards dedicated aquarists with rewarding pair-bond behaviour and impressive adult size. With a maximum length of around 15 cm, M. festivus is ideally suited to spacious, well-planted South American biotope aquariums.

Appearance

Mesonauta festivus displays a slender, laterally compressed body adorned with elegant vertical bars that intensify with mood and breeding condition. The base colour ranges from silver-grey to golden-beige, with subtle iridescent highlights on the scales and finnage. A distinctive dark spot near the caudal peduncle and flowing dorsal and anal fins give this species a regal, flag-like appearance—hence the common name "Flag Cichlid." Males develop slightly longer finnage and more intense coloration than females.

Natural Habitat

This species inhabits slow-flowing rivers, oxbow lakes, and flooded forest areas across the Paraná, Paraguay, Madre de Dios, Guaporé, Mamoré, Jamari, and Tapajós river basins. The natural environment is characterised by soft, slightly acidic water, dense vegetation, submerged wood, and leaf litter. In the wild, Barred Cichlids forage among roots and plants, feeding on small invertebrates, insect larvae, and plant matter, and often form pair bonds that persist across breeding cycles.

Aquarium Setup

Recreate a South American biotope with plenty of driftwood, broad-leaved plants (such as Amazon swords or Echinodorus), and open swimming areas. Use a sandy or fine gravel substrate and ensure stable water chemistry: pH 6.0–7.5, soft to moderately hard water (GH 5–12°), and a temperature of 24–28°C. A minimum of 250 litres is recommended for a pair or small group, with larger tanks supporting additional tankmates. Provide gentle to moderate filtration, regular water changes, and subdued lighting to reduce stress and bring out natural colours.

Water Parameters

Barred Cichlids thrive in soft, slightly acidic water typical of South American river systems. Aim for 24–28°C, pH 6.0–7.5, and soft to moderately hard water. Conduct weekly partial water changes (20–30%) to maintain low nitrate levels and replenish essential minerals. Use a high-quality filter rated for the tank volume, and consider adding driftwood or Indian almond leaves to naturally acidify and tannin-stain the water. Monitor parameters closely, as fluctuations can stress these sensitive fish.

Feeding

In the wild, Mesonauta festivus feeds on small invertebrates, insect larvae, and plant matter. In captivity, offer a varied omnivorous diet: quality cichlid pellets or flakes supplemented with frozen and live foods such as bloodworms, brine shrimp, daphnia, and insect larvae, plus some vegetable matter or spirulina-based foods. Feed small portions once or twice daily, and avoid overfeeding to prevent water quality issues. A balanced diet supports vibrant coloration, healthy growth, and successful breeding.

Behaviour

This species is semi-aggressive but generally more peaceful than many other cichlids. Barred Cichlids form strong pair bonds and may become territorial when spawning, but outside breeding periods they are calm and graceful. They spend much of their time exploring the mid-to-lower water column, foraging among plants and driftwood. Watching a bonded pair interact and care for their fry is one of the highlights of keeping this species.

Tank Mates

Suitable companions include peaceful to mildly assertive medium-sized South American fish such as larger tetras (e.g., Buenos Aires, Congo), Corydoras catfish, plecos, and other calm cichlids of similar size (e.g., Geophagus, Satanoperca). Avoid very small fish that may be eaten, highly aggressive cichlids, fin-nipping species, or overly boisterous tankmates. Careful planning and adequate space ensure a harmonious South American community.

Breeding

Mesonauta festivus typically form monogamous pairs and lay eggs on a flat surface or broad leaf, such as an Amazon sword or slate. Both parents guard the eggs and fry, fanning the eggs to ensure good water flow and removing any unfertilised eggs. Fry become free-swimming after several days and can be fed newly hatched brine shrimp or specialist fry foods. Soft, slightly acidic water and stable conditions improve breeding success. Provide a quiet, well-planted tank to encourage natural parental behaviour.

Why Buy from Tropical Fish Co

Tropical Fish Co is a leading UK specialist in South American cichlids for sale, offering healthy, quarantined species including the elegant Barred Cichlid. Every fish is carefully selected, acclimated to our expert holding systems, and dispatched with detailed care guidance. Whether you're building your first South American biotope or adding to an established community, our knowledgeable team is here to support your success. Order online today for fast, reliable delivery and discover why Tropical Fish Co is the trusted choice for premium freshwater fish for sale UK.