<a href=showthread.php?s=&postid=8136208#post8136208 target=_blank>Originally posted</a> by Earl45
I read there is a sea slug that eats only flatworms, but I cannot find the resource right now, and even if I could - I doubt they are sold commercially since I've been to quite a few stores and websites in the past few months and haven't seen a single instance of one being for sale.