Perciformes - Perches
Salmoniformes - Salmons and Trouts
Esociformes - Pikes
Siluriformes - Catfishes
Cypriniformes - Carps
Gadiformes - Cods
Scorpaeniformes - Mail-cheeked fishes
Clupeiformes - Herrings
Anguilliformes - Eels and morays
Pleuronectiformes - Flatfishes
Gasterosteiformes - Sticklebacks
Gobiiformes - Gobies
Osmeriformes - Smelts
Lamniformes - Mackerel sharks
Petromyzontiformes - Lampreys
Daugava or Western Dvina is a large river rising in the Valdai Hills of Russia that flows through Belarus then Latvia into the Gulf of Riga of the Baltic Sea.
It rises close to the source of the Volga. Its length is 1,020 km (630 mi), of which 325 km (202 mi) are in Russia. It is a westward-flowing river, tracing out a great curve towards its south which means it passes through northern Belarus.
