That looks interesting. Would love to see yours if it gets bigger.It's definitely not, it's a Bartholomea annulata. Same family, but different genus. Berghia didn't touch it, the copperband doesn't touch it, it's from the Caribbean, probably 4-5 inches in length, doesn't sting corals, and it has a reflexive reaction to touch that is totally different. Next goal is to track down a Pederson's cleaner shrimp since they have a "hosting" relationship. My sexy shrimp used to do the same too.
He was eating freeze dried mysis right out the avast. When I would go into would drop a cube of frozen and he would go right for that. He basically eats right out of your hand.For feeding the copperband while your were gone did you just have the avast going? What food?