Bagrus meridionalis
The Bagrus meridionalis is a catfish that can be found in almost all of Lake Malawi. During the day they mainly rest in burrows where they live in symbiosis with Pseudotropheus crabro. This Malawi cichlid eats the fish lice from the skin of Bagrus meridionalis.
Copyright images
Sarah Depper – CC BY 2.0
Gerard Semence – http://www.revedimages-gerard.com