Yea, alot
These are pretty much the entire region, not broken up by a lake.
Cameroon:
Astatoreochromis alluaudi
Astatotilapia bloyeti
Benitochromis batesii
Benitochromis conjunctus
Benitochromis finleyi
Benitochromis nigrodorsalis
Benitochromis ufermanni
Chromidotilapia guentheri loennbergi
Chromidotilapia guntheri guntheri
Chromidotilapia linkei
Etia nguti
Gobiocichla ethelwynnae
Hemichromis bimaculatus
Hemichromis elongatus
Hemichromis fasciatus
Hemichromis guttatus
Heterochromis multidens
Konia dikume
Konia eisentrauti
Myaka myaka
Oreochromis aureus
Oreochromis macrochir
Oreochromis niloticus niloticus
Parananochromis brevirostris
Parananochromis caudifasciatus
Parananochromis longirostris
Pelmatochromis ocellifer
Pelvicachromis pulcher
Pelvicachromis taeniatus
Pungu maclareni
Sarotherodon caroli
Sarotherodon galilaeus galilaeus
Sarotherodon galilaeus sanagaensis
Sarotherodon linnellii
Sarotherodon melanotheron melanotheron
Sarotherodon mvogoi
Sarotherodon steinbachi
Stomatepia mariae
Stomatepia mongo
Stomatepia pindu
Tilapia bakossiorum
Tilapia bemini
Tilapia bythobates
Tilapia cameronensis
Tilapia camerunensis
Tilapia dageti
Tilapia deckerti
Tilapia flava
Tilapia guineensis
Tilapia gutturosa
Tilapia imbriferna
Tilapia kottae
Tilapia margaritacea
Tilapia mariae
Tilapia nyongana
Tilapia rendalli
Tilapia snyderae
Tilapia spongotroktis
Tilapia thysi
Tilapia zillii
Tylochromis jentinki
Tylochromis labrodon
Tylochromis sudanensis
Tylochromis trewavasae
Tylochromis variabilis