Raccoons

A neighbor recently lost all but about 5 fish (he figures he had nearly 40
including a crop of last year's babies) to raccoons. Some of his fish were
10 years old so you can imagine how upset he is.

Since I live across the street, I'm concerned about the raccoon(s) stopping
by here. I've already had my battle with a heron which, Thank God, seems to
have stop visiting. I lost about 8 fish and don't want to lose more.

Other than netting (which is now up, or trapping, what's the best way to
discourage raccoons?

Thanks,

Tom in Howell, NJ