Seems like a good idea, since smacks of jellyfish have been known to shut down power plants.

This page started with an amusing name, and just kept getting wilder. 182 million fish per year were expected to die without any protection -- an incredible number, almost 6 fish per second. So now I think "Yes! By all means add some ultrasonic speakers to keep them out!" And then I learn that these speakers will cost £50m... As a part of £700m in total fish protection measures! And that somehow Natural England finds that to be be insufficient!?

I feel like every fish on the Welsh coast could have its own personal concierge for that price.