Alcolapia grahami, the Lake Magadi tilapia or Graham's cichlid, is a vulnerable species of fish in the family Cichlidae.

Alcolapia grahami is sexually dimorphic, the mature females are golden in colour while the males have pale blue flanks.

In the mature males the sides of the mouth have swollen, brilliant white patches and blue iridescent spots on their scales.

[1] They are active feeders in the evenings[2] and their main food sources are blue green algae, copepods and the larvae of Diptera,[1] the invertebrates being taken from the surface.

The reason for this appears to be due to the difficulty of diffusing ammonia into a highly alkaline environment, not pH regulation as previously thought.

[4] Although A. grahami lives in a very hostile environment, at least one species of parasite has managed to resist the same conditions, the Monogenea Gyrodactylus magadiensis Dos Santos, Ndegwa Maina & Avenant-Oldewage, 2019.