I have had one for a year or so now. They are great....though you need to make sure they have a nem to host in. Mine has hosted in a LT....that I ended up having to sell. It has also hosted in a green bubble tip and a small seabae.
Shrimp or crab. I have a shrimp. Can see thru it but has purple blue and pink. Very cool lives in anemone now that clowns gone used to live in leather and in Duncan.
mr_z - Not sure. I would imagine that it could. The question would be if you corals would like it hosting in them. I have never had one that was not hosted in some sort of nem.