Sio River
Largest tributaries
Perciformes - Perches
Salmoniformes - Salmons and Trouts
Esociformes - Pikes
Siluriformes - Catfishes
Centrarchiformes - Basses and sunfishes
Cypriniformes - Carps
Acipenseriformes - Sturgeons and Paddlefish
Gadiformes - Cods
Scorpaeniformes - Mail-cheeked fishes
Anguilliformes - Eels and morays
Clupeiformes - Herrings
Gasterosteiformes - Sticklebacks
Gobiiformes - Gobies
Syngnathiformes - Pipefishes and Seahorses
Atheriniformes - Silversides
Petromyzontiformes - Lampreys
Perciformes - Perches
Salmoniformes - Salmons and Trouts
Esociformes - Pikes
Siluriformes - Catfishes
Centrarchiformes - Basses and sunfishes
Cypriniformes - Carps
Acipenseriformes - Sturgeons and Paddlefish
Gadiformes - Cods
Scorpaeniformes - Mail-cheeked fishes
Anguilliformes - Eels and morays
Clupeiformes - Herrings
Gasterosteiformes - Sticklebacks
Gobiiformes - Gobies
Syngnathiformes - Pipefishes and Seahorses
Atheriniformes - Silversides
Petromyzontiformes - Lampreys
The Sió or Sió channel is a significant river in Transdanubia. Its length is 120.8 km. Originally a natural watercourse, today it ensures the regulation of the water level of Balaton and creates a connection between Balaton and the waterway system of Europe.