Bolska
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Perciformes - Perches
Salmoniformes - Salmons and Trouts
Esociformes - Pikes
Siluriformes - Catfishes
Centrarchiformes - Basses and sunfishes
Cypriniformes - Carps
Acipenseriformes - Sturgeons and Paddlefish
Gadiformes - Cods
Clupeiformes - Herrings
Scorpaeniformes - Mail-cheeked fishes
Anguilliformes - Eels and morays
Gobiiformes - Gobies
Gasterosteiformes - Sticklebacks
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
Clupeiformes - Herrings
Scorpaeniformes - Mail-cheeked fishes
Anguilliformes - Eels and morays
Gobiiformes - Gobies
Gasterosteiformes - Sticklebacks
Syngnathiformes - Pipefishes and Seahorses
Atheriniformes - Silversides
Petromyzontiformes - Lampreys
Bolska je reka na severoistoku Slovenije desna pritoka reke Savinje duga 32 km.
Bolska nastaje kod naselja Ločica pri Vranskem u Posavskom gorju, gde se spajaju potoci Zaplaništica i Motnišnica na nadmorskoj visini od 800 metara. Od izvora Bolska teče prema istoku do Vranskog gde prima pritoku Merišnicu, a zatim ide dalje prema istoku sve do svog ušća u Savinju kod Prebolda.
Sliv Bolske obuhvata oko 190 km², i proteže se najvećim delom po Savinjskoj dolini.