Crabs part of your CUC?

[LoJack]

Yup, I have a few blue legs, a few scarlets and one emerald

I've found my emerald crab in my SPS colonies at night. But I always watch for signs of stress from the coral the following day, and he doesn't appear to be eating polyps.

My only issue with hermits is that they knock things over, and kill of snails whenever they feel like it.

I believe whole heartedly that hermits are great detrivores, just a problem with unattached corals and snails lol