I think either the cocktail shrimp or silversides. I feed my rock anemones silversides already gutted and sometimes I shoot brine shrimp in their mouths.
I had a sebae that snatched one - two shrimp pellets from my cleaners and CBS and dropped it onto my condi. He lived a healthy life til he climed up the glass and go to close to the filter tube....it's crab is hostless now...