Paretroplus nourissati, the lamena, is a species of cichlid from the vicinity of the confluence of the Amboaboa and Mangarahara Rivers near Mandritsara in northern Madagascar.

[1] Like other members of the lamena group, it is a rheophile (although less so than Oxylapia polli), and typically found in river sections that are shallow, clear and fast-flowing.

[3] P. gymnopreopercularis is found in the same region, but it appears to be restricted to deeper pools in the river.

[3] A member of another cichlid genus, Ptychochromis insolitus, is also restricted to the region.

[4] The specific name honours the cichlid aquarist Jean Claude Nourissat (1942-2003).