Like OkieBass133 says big fish eat little fish, and big/little is quite relative. we once saw big fish (about 2") eating little fish (about 1/4"). Quite a frenzy to witness. I suspect a #28 or #32 would have been necessary to immi the "little" fish...#32 and ONE strand of pearl flashabou or krystal flash.
We regularly use #12's, but....?
...lee s.