Labeotropheus trewavasae 'Chizumulu'

Labeotropheus trewavasae 'Chizumulu' is the population of the Trewavas' Labeo Cichlid collected from Chizumulu Island in central Lake Malawi. The species is immediately recognisable by its strongly underslung, flattened snout — a unique morphological adaptation for scraping algae from rocks in surge zones where strong wave action prevents most other fish from feeding. Males display vivid blue with orange dorsal fins; OB (orange blotch) females and males are common in this polymorphic species.

Chizumulu locale specimens are valued by collectors for their distinctive markings and geographic provenance. The species is highly territorial, with males aggressively defending feeding and spawning territories. A harem of one male to multiple females is essential. Females are maternal mouthbrooders holding eggs and fry for approximately 21–28 days. A strictly algae-based diet is mandatory; high protein foods cause fatal Malawi bloat.