I haven't had much luck with feeding Japanese beetles to the fish, I also catch bags full of them in the summer months but the fish don't appear to like them, pretty much wont eat them, I thought it would be the perfect way to get rid of the beetles and let the fish have a bunch of food but they didnt agree, spit them back out. Good Luck!

All the really good ideas I've ever had came to me while I was milking a cow.