Terraqua ES is the UK distributor of an innovative line of products for creating Fish Pass solutions enabling fish, elvers and eels to safely navigate weirs, dams and other river obstructions as they migrate up stream to feed and grow. Mature eels return to the ocean to spawn.
As Eels are catadromous (living in fresh water but spawning in the sea), dams and other river obstructions can block their ability to reach inland feeding grounds. Since the 1970s an increasing number of eel ladders have been constructed to help the fish bypass obstructions. Products are listed on the Fish Pass page.
These video clips show examples of fish ladders in action and how eels navigate the ladders through the matting maze.