Tidal turbines 2

http://webecoist.com/2008/11/09/hydroelectric-wave-tidal-power/11-underwater-tidal-power-station/

Worlds Biggest Underwater Tidal Power Station

Portugal is soon to be home to the world’s largest tidal energy project – with three hundred 60-foot-tall tidal turbines producing enough power to provide energy to 200,000 homes. Their out-of-the-way location on the ocean floor will help reduce their impact on ecosystems which near-to-the-surface tidal power generators are often much more challenged to do.