Balkana Lake

Perciformes - Perches
Salmoniformes - Salmons and Trouts
Esociformes - Pikes
Siluriformes - Catfishes
Centrarchiformes - Basses and sunfishes
Cypriniformes - Carps
Acipenseriformes - Sturgeons and Paddlefish
Gadiformes - Cods
Anguilliformes - Eels and morays
Clupeiformes - Herrings
Scorpaeniformes - Mail-cheeked fishes
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
Anguilliformes - Eels and morays
Clupeiformes - Herrings
Scorpaeniformes - Mail-cheeked fishes
Gobiiformes - Gobies
Gasterosteiformes - Sticklebacks
Syngnathiformes - Pipefishes and Seahorses
Atheriniformes - Silversides
Petromyzontiformes - Lampreys
Balkana je kompleks od dva veštačka jezera kod Mrkonjić Grada, uz put Jajce – Bihać. Smeštena su u okviru istoimenog turističko-rekreativnog centra.
Jezera su nastala 70-ih godina 20. veka, a nazivaju se Velikim i Malim jezerom. Ovalnog su oblika. Vodom se napajaju iz planinskih potoka Cjepalo i Skakavac i sublakustrijskih izvora ispod Velikog jezera. Jedina otoka je Crna rijeka, koja se uliva u Vrbas.
Veliko jezero je bogato ribom: amur, linjak, pastrmka i dr.