Tropheops lucerna is a species of cichlid endemic to Lake Malawi where it is found at depths of 2mto4mm (07feetto13feetm) in beds of Vallisneria in bays. This species can reach a length of 13.5cm (05.3inches) TL. It can also be found in the aquarium trade.[1] It feeds by brushing loose strands of algae off of rocks, sand and the leaves of macrophytes.