Engineering work was being carried out on the Birmingham canal at Wolverhampton. So the Canal & River trust drained the Birmingham canal in a section between two locks. They then carried out a fish rescue. They used electricity Electro fishing to stun the fish and then gather them in nets and move them to a safe area of the canal. We see a few fish. Perch, Roach and an Eel. We speak to a fisheries expert from the canal and River trust and learn some fascinating fishy facts about Eels and canal fish in general. When lock gates are being replaced on Britains canal network parts of the canal have to be closed and drained. This is a fascinating time as we get to see a drained canal. Plus we see the fish wildlife living in the canal.