Aquarium trade and fish farms as a source of non-native freshwater fish introductions in French Guiana

International audienceRivers of French Guiana are still little invaded by non-native fish, but several fish introductionswere recently recorded through the development of aquarium fish trade and fish farms. Here we reportrecords of 11 non-native fish species. Among them, four (Cichla monoculus, Heros efasciatus, Mesonautaguyanae and Poecilia reticulata) are established and one of them (Heros efasciatus) is rapidly increasing itsspatial range. Two species (Hyphessobrycon eques and Pterophyllum scalare) were not retrieved in recentrecords and are probably extinct from French Guiana. The establishment status of the five other species(Arapaima gigas, Colossoma macropomum, Cyprinus carpio, Oreochromis mossambicus andOsteoglossum bicirrhosum) is uncertain and only a few specimens were observed in the wild.Nevertheless, these species, intensively reared in nearby countries, belong to highly invasive species able tocause detrimental impacts on recipient ecosystems. Those first occurrences of invasive fish species in FrenchGuiana should therefore act as an early warning for both researchers and environmental managers