|Range||Betsiboka River basin in northwestern Madagascar.|
Paretroplus tsimoly is a species of cichlid in the family Cichlidae. It is endemic to the Betsiboka River basin in northwestern Madagascar. Like other members of the lamena group, it is a rheophile (although less so than Oxylapia polli). This relatively elongate Paretroplus reaches about 16 centimetres (6.3 in) in length, and is closely related to Paretroplus lamenabe and Paretroplus nourissati.