Looks fine to me. It seemed a little deflated in the first pic, but better in the second. I don't think there's anything to be concerned about, so just keep an eye on it (don't go moving it around).
When you feed the tank, is it showing a feeding response (putting out feeding tentacles)? If so, I'd try to target feed with a little mysis or whatever you are feeding the fish... not because there's anything wrong, but wellsophyllia do well with some supplemental feeding.