malawi.si

Lake Malawi cichlids — species, locations & maps

Lake Malawi cichlids — species, locations & maps
By genera By locations Locations Maps Posters Interactive map
Maylandia callainos 'Puulu'.jpg Maylandia callainos 'Ruarwe'.jpg Maylandia callainos 'Usisya'.jpg
Previous pageMaylandia callainos 'Usisya'<br><font color=gray>Metriaclima callainos 'Usisya'</font>
Genus: Maylandia
Type locality: Nkhata Bay, Lake Malawi.
Biotope: Primarily inhabits rocky habitats, including deeper rocky zones as well as sediment-influenced areas and intermediate habitats. It is found from shallow water down to about 25 m depth.
Geographic distribution: Occurs naturally along the northwestern coast of Lake Malawi between Kande Island and Ngara, and along the northeastern coast between Puulu and Ikombe. Along the Tanzanian shoreline only the so-called “Pearl” variant is present. In the southern part of the lake the species was introduced in the 1970s and is now widespread around the Nankumba Peninsula, including Maleri and Nankoma islands, as well as Nakantenga Island and Chidunga Rocks.
Typical adult size: Males reach about 11 cm total length in the wild, while females remain roughly 10–20% smaller. In aquaria, males may exceed 15 cm.
Sexual dimorphism: At the type locality both sexes are blue and females can usually be recognized only when mouthbrooding. In northern populations, clear sexual dimorphism occurs, with males ranging from cobalt blue to pearl white, while females are cream-colored, white blotched, or occasionally blotched with pinkish-blue tones, depending on locality.
Recommended aquarium size: 300 L.
Aquarium setup: Provide abundant rockwork forming caves and visual barriers. A minimum tank length of about 125 cm is recommended. Stock one male with 3–4 females, or maintain larger groups in sufficiently large aquaria. Although generally not highly aggressive, males can be aggressive toward conspecifics, and aggression is best reduced by keeping them with other algae-grazing mbuna.
Diet: Herbivorous algae grazer feeding mainly on Aufwuchs scraped from rocks, consisting largely of algae and diatoms. It also feeds on plankton but usually remains closer to the substrate while doing so.
Breeding: Males establish territories among rocks, with territories often spaced closely in dense populations. Spawning takes place inside caves and is rarely observed. Females are maternal mouthbrooders, remaining solitary while brooding for about three weeks. Fry initially stay together in small groups among rocks before dispersing.
Aggression: Aggressive mainly toward conspecifics, especially between males. Generally tolerant toward other species, though aggression increases toward similarly colored mbuna.
Special notes: Known in the aquarium hobby as “Cobalt Zebra” and “Pearl Zebra,” which represent color variants of the same species rather than distinct taxa. Females of this species are unusual among mbuna in often being blue or pale rather than brown, which may play a role in species recognition. Hybridization with other Maylandia species has been documented both in aquaria and, locally, in the lake.

Photo gallery

Photo: © Pete Barnes
malawi.si
Lake Malawi cichlids — species, locations & maps.
All images are used with permission of the authors. Unauthorized use is prohibited.
Quick links
By genera By locations Locations Maps Posters Interactive map
Contact
Email Facebook Instagram
© malawi.si