Do zoanthids and peppermint shrimp mix at all? The latter is considered reef safe, but watching him harassing my zoanthids, I wonder if this is fully true. My first small colony of zoanthids didn't make it. I don't want to blame it on the pod in question, but he is displaying a behavior that concerns me: he's very interested in the zoanthids, and even though apparently "just" cleaning around, he still bites them with his little pincers, scaring them enough to close.
