I had a crayfish with small cichlids back before I went native. They were fine together for a year, then the crayfish molted, and the sunfish somehow pulled him from his hole and picked him clean. I came home and there was nothing left but the shell. I would expect the same from sunfish...Ok well I guess no crayfish for me . Also where would be a good place to start collecting? (Plan on going before it gets colder) I live near a river but I haven't found much there asides from blacknoes dace and brook stickleback.