Today at the LFS
they had several sponge crabs for sale. I have found conflicting information on them about being reef safe and if they get along with other invertebrates such as hermit, emerald and sally light foot crabs. They are very similar to the decorator crabs they had a while back but they don't have any specific information on them. The sites do agree they are nocturnal so I know they won't be out much.
My research doesn't seem to turn up much information on them and I am trying to decide if they will work with my current and future stocking plans.