I have a small carpet approx 3- 4" diameter that refuses everything but chopped squid. No feeding response at all from krill, mysis, silversides or scallops but drop a cube of Sallys chopped squid onto its tentacles and it's gone in a few seconds. I can't imagine that that was what it fed on in the wild. Anyway, the moral is, they can be very selective or eat just about anything so it pays to persevere until you find its preferences.