 Several of the remaining species are seriously threatened and additional extinctions are possible.Some species have survived in nearby small satellite lakes, have survived in refugias among rocks or papyrus sedges (protecting them from the Nile perch), or have adapted to the human-induced changes in the lake itself.Such adaptions include a larger gill area (adaption for oxygen-poor water), changes in the feeding apparatus, changes to the eyes (giving them a better sight in turbid water) and smaller head/larger caudal peduncle (allowing faster swimming).