The project involved 18 primary schools from across the Wee County as well as St Patrick's in Denny and Ladeside Primary in Larbert.
The fish are being released into the Brothie Burn and the River Carron.
Those behind the scheme said it helped the youngsters understand more about the environment.
The three-year project is being run in partnership with the area's local authorities and the Clyde River Foundation.
Guy Harewood, Clackmannanshire biodiversity officer, said: "Pupils and teachers alike agree that this project has been a great success.
"It has raised the children's awareness of river ecosystems helping them understand the importance of conserving the natural environment and the implications human activities such as pollution, litter, loss of habitat can have on rivers in a way that no amount of book work could ever match."
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