How do I catch fish in reeftank?

[Twisted-1]

I figure I have to many fish in my reef tank. How would be the best way to catch these fish?? I have no way of removing any rock from the tank so how would I do this?

I have a coral beauty, dragon wrasse (always moves my frags around), pijama cardinal, and posibly a Niger trigger. If anyone knows any tricks to catching these fish please let me know. They all run and hide when the net comes in. I might try to catch them when it's feeding time but other then that I have no chance.

Thanks for any help.