tanganyika

Tropheus Duboisi Maswa F1

Tropheus duboisi “Maswa”, one of the most striking Tropheus variants from Lake Tanganyika, famous for its dramatic juvenile-to-adult color change.

🐟 Tropheus duboisi “Maswa” — Species Description
📏 Size

Adult size: 12–14 cm (5–5.5 inches)

Stocky, muscular body

Males and females look very similar

Slow-growing, especially in the first year

🌍 Occurrence (Natural Origin)

Endemic to Lake Tanganyika, East Africa

Maswa locality:

Central–southern part of the lake (Tanzanian shoreline)

Habitat:

Shallow rocky shorelines

Strong wave action

Sunlit rocks covered in algae (aufwuchs)

Lives in large grazing groups

“Maswa” is a true geographic locality, not a selectively bred form.

🎨 Appearance

Juveniles:

Jet black body

Covered in bright white to blue spots

One of the most distinctive juvenile patterns of any cichlid

Adults:

Dark blue to black body

Bold white vertical band behind the head

Spots gradually disappear as the fish matures

This transformation can take 12–18 months.

🍽️ Diet (Preferred Food)

In the wild:

Specialized herbivore

Feeds on:

Algae (aufwuchs)

Microorganisms living within the algae

In the aquarium:

High-quality spirulina-based pellets or flakes

Blanched vegetables:

Spinach

Zucchini

Romaine lettuce

Shelled peas

Occasional algae wafers

⚠️ Avoid animal protein — Tropheus duboisi is extremely prone to bloat if fed incorrectly.

🧠 Behavior & Temperament

Highly aggressive but social

Constant hierarchy and dominance displays

Aggression is distributed only in large groups

Must be kept:

12–15+ individuals

No pair bonding — social structure is group-based

🏞️ Preferred Aquarium Conditions

Tank size:

Group: 450–600 L (120–160 gallons) minimum

pH: 8.5–9.2

Hardness: Very hard

Temperature: 24–26 °C (75–79 °F)

Substrate: Sand

Décor: Large rock structures with open grazing surfaces

Water movement: Strong

Filtration: Heavy, oxygen-rich

Stability and cleanliness are absolutely critical.

🧾 Quick Summary
Feature Details
Scientific Name Tropheus duboisi
Locality Maswa
Lake Tanganyika
Adult Size 12–14 cm
Diet Strict herbivore
Temperament Aggressive, social
Difficulty Advanced

⚠️ Critical Compatibility Notes

Do NOT mix with:

Other Tropheus species or localities

Carnivorous Tanganyika fish (Frontosa, Altolamprologus)

Malawi cichlids

Best setup:
👉 Species-only Tropheus duboisi Maswa tank

🧠 Expert Tip

With Tropheus duboisi, success comes down to three rules:

Large group size

Low-protein, high-fiber diet

Rock-solid water quality

Break any one of them, and problems start fast.