Tropheus Variants

About

'Tropheus sp.' on a price list is a genus, not a species, and that is the whole problem this entry exists to explain. Our catalogue already has Tropheus moorii and Tropheus duboisi as their own pages; this one is about the rest — the Ikola, Bemba, Mpimbwe, Ilangi, Kaiser, black and red fish that arrive under a bare genus name and a locality. Wikipedia records the genus as 'a small genus of at least six species of cichlids endemic to Lake Tanganyika' (annectens, brichardi, duboisi, kasabae, moorii, polli). Against those six sit far more colour populations: Wolfgang Staeck, summing up half a century with the genus in TFH, writes that genetic study distinguished 'several lineages with distinct patterns of genetic divergences' among 'the approximately 100 different colored populations, which originally were described as color morphs of T. moorii'. Three consequences follow, and all three are practical. First, variants must never be mixed. Seriously Fish's verdict on the moorii morphs is that 'Obviously, these should not be mixed in aquaria, as they will hybridise freely', and Practical Fishkeeping says the same about localities: do not 'put different geographical races of Tropheus or individuals from different localities together in the same tank as this frequently leads to unwanted hybridisation'. A bag labelled only 'Tropheus sp.' therefore cannot safely be topped up from the next shipment, because you have no way of knowing whether it is the same population — which makes the unlabelled fish a worse buy than a named one at twice the price. Second, the bloat. Tropheus die of feeding mistakes more than of anything else, and the mistakes are the foods every other cichlid gets: see the feeding notes. Third, the crowding paradox, which is the part newcomers get exactly backwards. Kawanabe's field work, quoted by Staeck, 'found that the size of the feeding territories was between 0.2 and 1.2 square meters (2 and 13 square feet), averaging 0.8 square meters (9 square feet) overall'; mating territories run to three or four metres across. No aquarium can give one fish that, and Staeck draws the conclusion: it 'explains why only two or three particularly dominant individuals usually show their conspicuous coloration in an aquarium, while all the other fishes—which cannot occupy a territory of their own and consequently suffer from continuous stress—hardly show any colors, but look more or less dark brown or blackish'. The answer is not fewer fish but more of them: Seriously Fish recommends 'a group of 15-20 fish in order to reduce territorial behaviour', and Practical Fishkeeping is blunter — 'The only way to keep these species in captivity is in a group of ten or more'. A trio of Tropheus is not a cheap start; it is two fish that will be killed. Finally, on plants: we checked rather than assumed. Tropheus rasp algae off rock, which under this catalogue's standard is grazing rather than plant-eating, and no care source we could find reports them stripping or uprooting living plants in the aquarium — several instead recommend hard-water plants such as Anubias in a Tropheus tank. So this entry is marked plant-safe, even though a Tropheus tank is built of rock and open sand for other reasons entirely.

Care

One variant, one tank, a big colony and a green diet. Seriously Fish gives '48″ x 12″ x 12″ (120cm x 30cm x 30cm) – 110 litres for a single specimen' but adds that a group needs far more, settling on 'A 60″ x 18″ x 18″ tank being the minimum size for a group' — 150 x 45 x 45 cm, about 300 L, and that is what we gate on. Stock it in one go with fifteen to twenty fish of a single named population, never a mixed bag and never a trio, and expect to buy from one source: replacing losses from a different shipment restarts the hierarchy and risks hybridising the colony. Build a rock aquarium over sand, with many caves and broken sight lines — Practical Fishkeeping notes that 'All Tropheus species in the aquarium are territorial and relentlessly chase conspecific males' — and keep the water hard, alkaline (pH 8.4-8.9), warm at 24-26 °C, heavily filtered and genuinely oxygenated. Seriously Fish is explicit that 'water quality is of the utmost importance in a Tropheus tank, as they are very susceptible to "bloat"'. Feed spirulina and greens in small portions, once a day, and no frozen invertebrates. Wild-caught and locality-labelled fish are the norm here, so quarantine properly and expect a settling-in period.

Diet

Strict aufwuchs grazer. Spirulina flake or pellet, blanched greens and nori in small daily portions. Bloodworm, artemia, tubifex, beefheart and earthworm are the foods that kill this fish, whatever the variant.

Telling males from females

What works for this species, most reliable first.

• Extended finsStrong · from about 8 months, and later in a suppressed male

  On many cichlids and killifish the male's dorsal and anal fins draw out into trailing points as he matures, while the female's stay rounded.

• VentingA hint only · only on a mature fish, easiest when she is in breeding condition

  The method breeders use when the answer has to be right. Hold the fish upside down in a wet hand or soft net and look at the two openings ahead of the anal fin. The forward one is the anus; the one behind it is what you are reading.

• Adult sizeA hint only · only across animals of the same age

  In many cichlids, catfish and loaches one sex simply grows larger — usually the male, though there are well-known reversals.

Also in these lists

Similar species

Same category and the closest water parameters — if this species isn't quite it, start here.

Sold in Lithuania

These Lithuanian shops listed this species in their public catalogue (checked August 8, 2026). Stock moves — ask before you travel.

These links are unpaid: we get nothing for them and ask for nothing.

Frequently asked questions

What tank size does a Tropheus Variants need?

A Tropheus Variants needs an aquarium of at least 300 litres (79.3 US gallons) with a footprint at least 150 cm (59.1 in) long — for this species, swimming length matters as much as raw volume.

What water parameters does a Tropheus Variants need?

Tropheus Variants does best at 23–27 °C (73.4–80.6 °F), pH 8–9.5 and a general hardness of 8–25 °dGH.

What group size does a Tropheus Variants need?

Tropheus Variants is a social species — keep a group of at least 15 so natural behaviour emerges and stress stays low.

Is the Tropheus Variants suitable for beginners?

Tropheus Variants is a demanding species best attempted with some experience — it needs stable, closely watched conditions to thrive.

Sources

• Seriously Fish — Tropheus moorii (genus-level husbandry for the trade line)
• Practical Fishkeeping — Tropheus: home is where the rocks are
• Wolfgang Staeck, TFH Magazine — Half a Century of Experience with Tropheus Species: A Summary, Part 1
• Wikipedia — Tropheus
• Practical Fishkeeping — An Overview of Tropheus: Aggressive Gardeners of Lake Tanganyika
• aqua-fish.net — Complete Guide to Tropheus Cichlid Care