Types of habitats where S. woodiana occurs: (A) Fish pond in a pond complex and (B) canal supplying water to the fish pond farm in Ruda Maleniecka, Czarna Konecka River basin, Poland. (C) Desiccated fish pond with visible S. woodiana shells at the bottom (Oszust pond in Brzeszcze, Vistula River basin, Poland. (D) Danube River in Dömös (Hungary). (E) Olt River (tributary of the Danube River) reservoir and hydroelectric plant near Avrig (Transylvania, Romania). (F) Fish pond complex near Cefa village in the Cris Rivers Basin, Romania where S. woodiana was first found in Europe. Photo credit by Anna Maria Labecka (A, B), Katarzyna Pawlik (C, D) and Ioan Sîrbu (E, F).