A people eater is a palythoa, a type of zoanthid, usually larger than a zoanthis. There are zoanthis, palythoa, protopalythoa and others. With those 3 the most popular kept zoas. Its just a name that started out purple people eaters from a song in the 60s, and now there are red, orange, green etc people eaters. Most are brown or grey. Its just a name thing. This name thing has kind of gone nuts!