GYMNOCORYMBUS TERETZI – BLACK TETRA (AKA – BLACK SKIRT TETRA,  BLACK WIDOW TETRA, BLACKAMOOR, BUTTERFLY TETRA AND PETTICOAT TETRA)       The commonly called Black Skirt Tetra comes from South America – Paraguay, Brazil and Bolivia – the drainage   basins of the Amazon, Rio Paraguay, Rio Pilcomayo, Rio Guapore, Rio Mamore, Rio   Beni, Rio […]