This Demonstration shows a prototype of a tidal stream turbine, which could be applicable for slow tide movement. The force of tidal currents provides a new type of renewable energy. Putting such turbines in out-of-the-way locations on the ocean floor might help reduce their impact on ecosystems.
C. Clover. "British Company to Build World's Largest Tidal Power Scheme." (Mar 16, 2008). www.lunarenergy.co.uk/thenewsDetail.php?id=15.