This spring, young sea-trout were freed in streams in Drenthe province in the Netherlands. This species used to live there, but had become extinct.
As the video shows, on 20 October 2015 the young trout were caught, measured and freed again, to find out how well they are doing. It turned out they were growing up well.
If all will go well, then they will migrate to the Lauwersmeer, and then to the sea.