Melanochromis vermivorus

Melanochromis vermivorus is an atypical member of its genus — while most Melanochromis are primarily herbivorous, M. vermivorus has evolved a more predatory diet specialising in worms and invertebrates, reflected in its species name ('worm-eater'). Males display a blue body with a white horizontal stripe and a noticeably elongated lower jaw that assists in extracting invertebrates from crevices and sandy substrate.

Native to the central rocky shores of Lake Malawi, this species occupies the interface between rocky and sandy habitats. Its more carnivorous diet requires higher protein nutrition in the aquarium compared to other mbuna species. Females are a pale yellowish-white with subtle striping.

In the aquarium, M. vermivorus requires a mixed substrate aquascape with both rocky areas and sandy patches for natural feeding behaviour. It is moderately aggressive and can be included in mbuna communities, but its dietary needs should be catered for with protein-rich foods. The elongated jaw of males is a fascinating anatomical feature that distinguishes it from all other Melanochromis species.