Taxonomy & naming
Maylandia mossambica was described in 2011 by Patrick Ciccotto, Adrianus F. Konings and Jay R. Stauffer Jr., in 'Descriptions of five new species in the genus Metriaclima (Teleostei: Cichlidae) from Lake Malaŵi, Africa,' published in Zootaxa (volume 2738). The type locality is Chiloelo on the Mozambican shore, and the species ranges along about 12 mi of that coast.
The genus name carries a long-running nomenclatural dispute. The species was described in Metriaclima, the genus Stauffer and colleagues coined in 1997 (Greek for 'moderately sloping,' for the head profile). But Maylandia — named in 1984 by Meyer, Riehl and Zetzsche for the German aquarist and author Hans-Joachim Mayland — is the older name and the senior synonym under the priority rule. Eschmeyer's Catalog of Fishes, this atlas's authority for valid names, lists the fish as valid under Maylandia mossambica and treats Metriaclima as a synonym; that is the usage here. The change of genus also changed the ending: the original neuter combination was Metriaclima mossambicum, while the feminine Maylandia takes mossambica.
The epithet is a toponym for Mozambique, the country whose Lake Malawi shoreline the species inhabits. The describers noted that mossambica phenotypically resembles Maylandia aurora — sharing the absence of a black band in the dorsal fin and the rock-sand-interface habitat — placing it in the intermediate-dwelling, dorsal-band-less group of the genus rather than among the clean-rock zebra forms.
Morphology
Maylandia mossambica is a small-to-moderate mbuna. FishBase records a maximum of 3 in standard length (SL); the holotype measures 3 in SL, with males in habitat at Chiloelo around 3 in SL and females noticeably smaller at about 2 in SL. In total length, males reach roughly 4 in and females about 1 in less. The body is the usual fusiform, moderately compressed mbuna form, with the moderately sloped head and bicuspid outer-row teeth of the genus, and — diagnostically for its group — no black submarginal band in the dorsal fin.
Male colour is strongly geographically variable, a hallmark of the species. At Lumessi, territorial males are grey-blue with the posterior edges of the scales gold over the upper two-thirds, a gold ventral third and gold ventral head, yellow cheeks and an orange gular region, faint lateral barring and a grey-black opercular spot. At Chinuni they are lighter blue with about seven grey bars; at the type locality, Chiloelo, they are light blue with seven or eight dark bars and black streaking. Females are uniform across the range — beige to light brown, with orange-to-yellow margins on the caudal and anal fins. This pattern of locally variable, colourful males over plain females is the standard mbuna dichromatism.
Habitat
Maylandia mossambica is a Lake Malawi endemic confined to the Mozambican (eastern) shore, along roughly 12 mi of coast between the Chiloelo River and Chinuni. Unlike strict rock-dwellers, it is an intermediate-zone fish: it lives where gently sloping rocky areas grade into sand, at depths of about 7 to 20 metres, often over a sandy bottom carrying a muddy sediment load. This places it in the rock-sand interface guild alongside species like Maylandia aurora rather than on the clean reef faces favoured by the zebra group.
The chemical setting is the standard Lake Malawi envelope: an ancient, strongly buffered rift lake with surface waters around 75–82 °F, alkaline pH of roughly 7.7–8.6, and moderate hardness, stable across the species' range. The intermediate habitat it occupies — scattered rock over sand — is a productive but exposed setting, sensitive to sediment movement.
Feeding
Maylandia mossambica feeds in the mbuna manner adapted to its intermediate habitat: it browses loose algae from the rocks and also takes phytoplankton from the water. The field accounts describe it focusing on diatoms and short algal strands, picking the digestible loose material while leaving the firmer algal matrix largely intact — a comparatively gentle grazing style. Over its rock-and-sand ground it can work both the scattered rocks and the open water above them.
The practical consequence for aquarists is the familiar one for aufwuchs feeders: a long, plant-adapted gut that copes poorly with rich, high-protein animal foods, and a corresponding susceptibility to 'Malawi bloat.' A spirulina- and vegetable-based diet, supplemented only sparingly, suits the species far better than meaty fare.
Mating
Breeding males of mossambica are territorial, defending a spawning site that the field accounts describe as a burrow under a rock on sand, or a sheltered spot among small rocks near the bottom — the intermediate-zone equivalent of the cave territories of clean-rock mbuna. The male advertises from this site in his locally distinctive breeding colour, displaying to females that move through the area, while females and non-territorial males remain solitary or in small loose groups.
No formal courtship study has been published, but the behaviour follows the standard haplochromine-mbuna sequence: the territorial male leads a receptive female to his burrow with lateral displays and shimmying movements, and spawning takes place at the shelter. Because males are colourful and site-attached while females are cryptic and mobile, mate choice is visual and territory-based, with the marked geographic variation in male colour suggesting locally divergent female preferences.
Breeding
Maylandia mossambica is a maternal mouthbrooder, like all members of its genus. Spawning occurs at the male's burrow: in the classic mbuna sequence the female lays eggs a few at a time and immediately takes them into her mouth, nosing at the egg-spots on the male's anal fin so that fertilisation happens at the mouth, repeating until the clutch is complete. Brooding females then become solitary, sheltering among the rocks during the roughly three-week incubation and feeding little, and release the free-swimming fry there with no further care.
Clutch size has not been published as a precise figure for mossambica; by the pattern of similarly sized mbuna it is modest, on the order of a couple of dozen eggs, and likely smaller still given the species' compact female size. In the aquarium the cycle replicates readily once a settled male and conditioned females are present; the comparatively large fry accept crushed flake immediately, and moving a brooding female to a quiet rearing tank improves survival in a busy community.
In the aquarium
Maylandia mossambica is an uncommon fish in the hobby, of interest mainly to mbuna specialists and collectors of geographic colour forms — its appeal is precisely the variation between the Lumessi, Chinuni and Chiloelo populations, which are best kept and bred as separate locality lines rather than mixed. Any keeper experienced with Malawi cichlids can manage it.
A tank of around 65–80 US gal suits a harem of one male with three or four females, with larger groups possible in correspondingly larger aquaria. Water should be hard and alkaline in the Lake Malawi mould — pH roughly 7.8–8.6, temperature 75–82 °F, moderate to hard general hardness — kept stable with a crushed-coral or aragonite substrate, strong filtration and regular generous water changes; soft, acidic water is unsuitable.
Because this is an intermediate-zone fish, an aquascape of open sand with scattered rock piles and burrowable shelter under flat stones suits it better than a solid rock wall, and lets females forage and shelter as they do in the wild. As with the genus, mossambica is aggressive toward conspecific males, so keep a single male and choose robust tankmates of contrasting colour so he does not mistake them for rivals. Diet should be spirulina- and vegetable-based to respect the aufwuchs-grazing gut and avoid bloat — the most common keeping mistake across the guild. To preserve the locality colours, keep one population per tank.
Conservation
The IUCN Red List assessed Maylandia mossambica (under Metriaclima) as Least Concern, with the assessment dated 22 June 2018. Least Concern here reflects a species that, while endemic to a single shoreline, occupies a continuous ~20-km stretch of coast with several populations rather than a single pinpoint reef — a broader footing than its single-island congeners such as Maylandia lundoensis and Maylandia midomo.
That said, mossambica remains a narrow-range endemic of one country's lakeshore, and its intermediate rock-and-sand habitat is the kind most sensitive to sediment loading. The Mozambican shore faces the familiar regional pressures of catchment deforestation, agricultural runoff and growing fishing activity. These sit within Lake Malawi's broader trajectory — basin-scale reviews such as Chavula et al. (2023) in the Journal of Great Lakes Research document growing fishing pressure, sediment and nutrient loading, and climate-driven warming that weakens the lake's seasonal mixing. None is recorded as an active decline in mossambica, which is why it sits at Least Concern, but the same pressures frame the long-term outlook for a single-shore endemic like this one.