Blackfordia virginica Mayer, 1910

Distribution in South America: medusa—Atlantic Ocean, Brazil to Argentina, from 7.68°S to 8.24°S, from 25°S to 26.50°S, and at the Río de la Plata Estuary (Paranaguá 1963; Migotto et al. 2002; Genzano et al. 2006, 2008a; Nogueira Jr. & Oliveira, 2006; Bardi & Marques 2009; Silveira & Morandini 2011; Nogueira Jr. 2012; Freire et al. 2014; Nogueira Jr. et al. 2015a).

Habitat: medusa—species considered a bioinvader (Genzano et al. 2006; Freire et al. 2014), commonly reported “within estuarine areas of temperate and tropical regions” (Bardi & Marques 2009:47).