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The ''Oreochromis niloticus'' ([[Nile tilapia]]) were also observed. This species of fish is considered harmful to native species. The scarcity of introduced species and the absence of Poeciliidae family, Osteoglossidae family and Cyprinidae family is recognisable in Masoala.
The population of freshwater fish in Masoala represents approximately 30.6% of the recorded species in Madagascar.<br><br>
Saltwater fish: