This is a particular profile we have to deal with, it was known as Haplochromis sp. "double stripe", van Oijen & Witte described Haplochromis thereuterion in 1996. Its general body shape evokes an arrow, a torpedo, a fish shaped for the speed; This is mostly a surface dwelling species eating insects larvae and adults in the wild. It has been recorded from the northern Mwanza Gulf at Anchor Island, Kissenda Island, Hippo Island, Nyegezi Bay, Nyegezi Rocks, and some recent catches seems to show an increasing population of this species at Makobe Island. It lives at Kissenda Island with the more oriented sandy species Haplochromis tanaos (van Oijen & Witte,1996) that is very close in male coloration and general body proportions. They are both segegrated by their foods(H. tanoas is a zooplanctivore), by their micro habitats (rocks/sand), by little details of their male coloration ( H. tanaos is more dark blueish on the upper body, black in the ventral part), teeth forms and little morphologics details of the jaw. It's a relatively peaceful fish living better if kept in good number of males and females in a 55 g tank. Males keep a little territory and try to attract the females in their little spawning pit. One should avoid keeping them with robusts mbipis (rock dwelling fish) because of their placidity, they won't defend their hole in front of aggressive fishes and surely, they won't spawn. Its elongated shape makes this fish quite unique in the insects eaters species, its coloration is very attractive and its gentle manners are another good point to show.