The Lamena (Paretroplus nourissati) is a species of cichlid in the family Cichlidae. It is found in the vicinity of the confluence of the Amboaboa and Mangarahara Rivers near Mandritsara in northern Madagascar. This relatively elongate Paretroplus reaches about 16 centimetres (6.3 in) in length, and is closely related to Paretroplus lamenabe and Paretroplus tsimoly. Paretroplus nourissati is threatened by habitat loss and invasive species.