Shooting Fish in a Barrel

I'm in a weird dream phase.

Last night I had one that involved a huge, muddy pit filled with water that was inexplicable clear. People lined the sides of the pit with harpoon guns while a man with a giant, inflatable fin swam back and forth. I didn't have a harpoon gun and asked the guy standing next to me how people could be sure they'd hit the fin and not the guy.

So this morning I listened to Moby Dick while searching the Internet for a song that had the lyrics "shooting fish in a barrel." I didn't find one and I'm pretty disappointed. There must be one out there, right?

I did find a thread with that title at the Gordon Lightfoot forums though. That made me feel a bit better but I won't be satisfied until I get that phrase in a song. It will probably be a country song.