See how banded kōkopu can climb the side of a plastic box using their grippy fins.
See why structures in streams need to have rounded tops to enable lamprey to move over them.
Children in Christchurch watch inanga swim along a culvert. Note how they can move easily where there are rocks in the bottom, but struggle when the surface is smooth.
More videos of freshwater fish are available on the New Zealand Fish Passage Advisory Group YouTube channel.