Blunthead Tropheus - Tropheus moorii

Scientific name: Tropheus moorii

Common name: Blunthead Tropheus

Family: Cichlidae

Usual size in fish tanks: 12 - 15 cm (4.72 - 5.91 inch)

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Recommended pH range: 7.8 - 9

Recommended water hardness: 10 - 20°N (178.57 - 357.14ppm)

0°C 32°F30°C 86°F

Recommended temperature range: 24 - 27 °C (75.2 - 80.6°F)

The way how these fish reproduce: Spawning

Where the species comes from: Africa

Temperament to its own species: aggressive/territorial

Temperament toward other fish species: aggressive/territorial

Usual place in the tank: Bottom levels

Overview

Tropheus moorii, known as the Blunthead Cichlid or Moorii, is one of the most iconic herbivorous cichlids from Lake Tanganyika. It is renowned for its wide variety of regional color morphs, ranging from fiery reds to deep blacks and bright yellows. In the wild, these fish graze constantly on aufwuchs (algae and microorganisms) growing on rocks along the shoreline.

Care & Tank Setup

• Tank size: Keep in groups of at least 12–15 individuals to spread aggression. A tank of 350–450 l / 90–120 gal is the minimum for a colony; larger tanks (500 l) are ideal.
• Water parameters: pH 7.8–9.0, hardness 10–20 °dGH, temperature 24–27 °C (75–81 °F). Replicate the alkaline, mineral-rich environment of Lake Tanganyika.
• Aquascape: Use extensive rockwork to create caves, sight-line breaks, and grazing surfaces. Sand or fine gravel substrate is preferred. Avoid driftwood, which may lower pH.
• Filtration: Strong filtration and high oxygenation are essential. Weekly 30–50% water changes help maintain stability.

Diet & Feeding

Tropheus species are strict herbivores with specialized digestive systems. Incorrect diet is the leading cause of bloat, a common fatal condition. Provide:

• Staple: High-quality spirulina flakes, algae-based cichlid pellets, and vegetable-based flakes.
• Supplements: Blanched vegetables such as spinach, zucchini, or peas.
• Occasional protein: Tiny amounts of mysis shrimp or Cyclops. Avoid high-protein foods like bloodworms or beef heart.

Behavior & Compatibility

• Intra-species: Highly aggressive within the colony, but group dynamics balance aggression. Never keep in pairs or trios — it results in bullying and fatalities.
• Other fish: Best kept in species-only tanks or with other robust Tanganyika cichlids that tolerate similar water chemistry (e.g., Julidochromis, Cyprichromis). Avoid mixing with Mbuna or aggressive predators.

Sexing

Sexing Tropheus moorii is difficult. Males are sometimes slightly larger with more intense coloration and may exhibit upturned noses. Lip scarring (from lip-locking) can indicate males, but external differences are subtle.

Breeding

A maternal mouthbrooder: after fertilization, the female collects the eggs in her mouth, where they incubate for about 3–4 weeks. During this time, the female usually hides and refrains from eating. Once fry are released, they can be fed on finely crushed spirulina flakes and baby brine shrimp (though plant-based foods remain essential).

Lifespan

With proper care, Blunthead Cichlids live 8–10 years, though some reports cite up to 12 years in optimal conditions. Poor diet and stress can significantly shorten lifespan.

Origin

Endemic to Lake Tanganyika (East Africa), where they inhabit shallow, rocky shorelines rich in algae growth.

Short description

Tropheus moorii is a vibrant and active cichlid, highly prized for its colorful regional variants. It requires a specialized herbivorous diet, large group housing, and alkaline water conditions. Best suited to experienced aquarists prepared to manage aggression and prevent digestive issues.

At-a-Glance (Care Box)

• Size: 12–15 cm (5–6")
• Temperament: Aggressive within groups; best kept in colonies
• pH: 7.8–9.0  |  GH: 10–20 °dGH
• Temp: 24–27 °C (75–81 °F)
• Tank: Colony (12 ) in 350 l / 90 gal
• Diet: Strict herbivore (spirulina, vegetable-based foods)
• Breeding: Maternal mouthbrooder
• Lifespan: 8–10 years (up to 12 in optimal care)

Pictures

Bought by aqua-fish.net from jjphoto.dk.

Red Rainbow

Mpulungu

Kapamba

Blue Rainbow

Kapere

Chimba

Moliro