Help!! Problem with Locals

Submitted to Community Café

I finished the koi pond a few months ago that I've been building in the backyard. It's 12' x 30'. Only problem is the local egrets and herons visit the pond. It is so sad to see the heron snap out a fish so easily.I spent over 2,000 just on the fish alone. I put posts in the ground and the net sits higher than the water level and no bird sightings BUT it takes away from the pond. What to do, what to do....any ideas? I sure could use one!
I've been trying to figure out to download the video here.