http://green.blogs.nytimes.com/2010/04/22/f-d-r-s-brief-dip-into-tidal-energy/?ref=science

The idea has occasionally been revived since then (most notably in the Kennedy administration), but this kind of tidal power — what’s called a barrage project — has generally fallen out of favor because of the high cost of building dams and the environmental damage they can cause. The in-current turbines being developed by Ocean Renewable Power and others are less expensive (although whether they will be cheap enough to be competitive in the energy market is an open question). And, while their potential environmental impact is still being studied, it’s probably fair to say they won’t have as widespread an impact as a couple of dams.

Fish chowder. Spawning fish won't survive. Still a no. Resonance change is not considered.