Spectrolebias reticulatus is a species of annual killifish in the genus Spectrolebias of the family Rivulidae, endemic to seasonal waters in the Paraguay, Tocantins–Araguaia, Xingu and Mamoré–Grande basins in Bolivia, Brazil and Paraguay.

[3][4][5] like other Spectrolebias species, reticulatus is threatened by habitat loss with its entire known range being in the area flooded by the Belo Monte Dam.

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