I have a 2 serpent stars and one black brittle, all are basically the same starfish, just a few different cosmetic differences. Only my red serpent is bold enough to be spot fed, I see the others maybe once every few weeks, and they hide if I try to spot feed them. Anyway, my red serpent comes running whenever it's feeding time. I feed the tank every 3rd day, and the serpent always gets a whole sand eel. But, it will eat just about anything. It enjoys scallops, shrimp, squid, krill, silversides. But, the sand eels are all my carnivore's and scavengers favorite.