Largest tributaries
Perciformes - Perches
Esociformes - Pikes
Centrarchiformes - Basses and sunfishes
Cypriniformes - Carps
Scorpaeniformes - Mail-cheeked fishes
The Oder is a river in Central Europe. It is the second-longest river in Poland in total length and third-longest within its borders after the Vistula and Warta. The Oder rises in the Czech Republic and flows 742 kilometres (461 mi) through western Poland, later forming 187 kilometres (116 mi) of the border between Poland and Germany as part of the Oder–Neisse line. The river ultimately flows into the Szczecin Lagoon north of Szczecin and then into three branches (the Dziwna, Świna and Peene) that empty into the Bay of Pomerania of the Baltic Sea.
