Schoolchildren on mission to restore rare fish to river

Last updated at 10:08
To enjoy the CBBC Newsround website at its best you will need to have JavaScript turned on.
Watch Joe's report from the River Wandle

Children from seven schools in London have been rearing their own endangered fish as part of a school project.

The children have taken three months to breed rare brown trout hatchlings.

They're doing it to get more trout back in the River Wandle in London.

Watch Joe's report as he joins them on their mission.