One of the interesting characteristics of Tilapines is how the shape of the mouth is often determined by the type of food available in whatever area they colonize.
When the Tilapine below, Stomatepia pindu evolved as an isolated species in Lake Barumbi mbu it became predatory upon fish fry, and aquatic insects, it developed a sort of Parachromis set of jaws, and the spots in the head area became receptors to help find prey.

as did its sister Tilapine species S. mariae

But another Tilapine in the same lake, from the same ancestor, the species Konia eisentraudti ,developed a different shaped mouth for eating fish eggs and algae

There is another Tilapine ancestor in the lake that adapted to eating freshwater sponges, Pungu maclerini .
Or.....from another tiny isolated lake, (Lake Bermin), where ancetral Coptodon zillii type was trapped, evolved into a similar looking but much smaller growing Coptodaon bythobates, an omnivore.
