Labidochromis chisumulae Breeding Guide

How to breed the Chisumulae Lab (Labidochromis chisumulae), a small Lake Malawi mbuna that is a maternal mouthbrooder best kept in a harem.

Overview

Labidochromis chisumulae is a small mbuna endemic to the rocky shores of Chizumulu Island in Lake Malawi, where it occupies the sand-to-rock transition zone at depths of 3 to 20 metres. Males reach around 8 cm in the wild, with females slightly smaller. It is an egg-laying maternal mouthbrooder: the female incubates the eggs and developing fry in her mouth. The species is relatively peaceful and not strongly territorial, which makes colony breeding manageable in a suitably furnished tank.

Sexing

Males grow somewhat larger than females and are more strongly coloured; in aquaria males may reach roughly 10 cm while females stay near 8 cm. As with other Labidochromis, dominant males display more intense colour during courtship, while females remain plainer. Because the genus hybridises readily, only one Labidochromis species should be kept per tank to ensure pure offspring.

Conditioning

Although other mbuna are largely vegetarian, the diet of L. chisumulae is less herbivorous; in nature it feeds mainly on small crustaceans, insects and insect larvae while also pecking at aufwuchs and a small amount of algae. For conditioning, a standard mbuna vegetable diet should be supplemented with frozen foods such as Mysis, Daphnia and brine shrimp to bring females into spawning condition.

Breeding Setup

Keep one male with several females (a harem) to spread his attention and reduce harassment. Furnish the aquarium with a filter-sand bottom and ample rockwork providing crevices and caves between which the fish can hide and establish territories. Hard, alkaline water suits the species, with reported parameters of about 22-26 degrees C, pH 7.5-8.5 and a general hardness near 12-16 dGH.

Spawning Behavior & Trigger

When ready, the male displays to a female and leads her to a chosen spot. She deposits her eggs, the male follows and fertilises them, and the female immediately picks the eggs up into her mouth to incubate them. This typical mbuna mouthbrooding sequence allows females to carry a brood while remaining mobile within the rockwork.

Egg & Fry Care

The female holds the eggs and larvae in her buccal cavity through incubation, after which she releases free-swimming fry. A holding female may be moved to a separate maturation tank to protect the brood and let her recover before release. Newly released fry are large enough to accept finely crushed prepared foods and small live or frozen items appropriate to their size.

Common Challenges

The main risk to pure broods is hybridisation, so only a single Labidochromis species should be present. Male harassment of females can be reduced by maintaining a harem and providing plenty of broken sightlines among the rocks. Holding females may be stressed if disturbed, and may prematurely release or swallow a brood under poor conditions.