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AI illustration of Mesonauta festivus, complete left-facing side view

Mesonauta festivus

Mesonauta festivus

Blue facial markings and iridescent blue scales occur in some wild Brazilian stocks; new arrivals may be shy.

Blue facial markings and iridescent blue scales occur in some wild Brazilian stocks. New arrivals may be shy.

Adult length
Up to 10 cm (standard length, without the tail fin)
Water temperature
24–28 °C
Lifespan
5–8 years
pH
6–8
Hardness
0–5 dGH
Natural habitat
Recorded from sandy river shores, creeks and pools, often near vegetation over sand or mud, with some records from unvegetated sites.

The trade name Flag Cichlid often actually refers to M. insignis.

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Social behaviour and territory

Usually mild, but more active in territorial defense during breeding. Give other fish room to retreat.

Diet and feeding

Omnivorous; combine prepared food with small animal foods and plant ingredients.

Sources

www.aquariumglaser.de ↗ 2026-10-23

www.fishbase.se ↗ 2026-10-25

www.seriouslyfish.com ↗ 2026-10-23

PeekFish · Ornamental fish

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