Over the last few months, I've heard many people say that hermit crabs really aren't worth having in your tank, that they cause more havoc than they cure, etc. I can certainly attest that I have a few jerks. Just lastnight a large green decided to snip the thin bond between two groups of zoas, for no apparent reason other than to just do it. I also have a mexican redleg that like to sit at teh very top of a colony of small star polyps, and another that has to climb over a small group of purple zoas every 2 hours or so (i'm starting to think he's OCD). They've killed several snails, and not even for their shells (you'd think this would be because ther was no food, but there's plenty in there). I hate to say it, but I'm starting to side with the "they're no good" crowd, but fear what may occur in my tank if I were to get rid of them...