This is what I was hoping it was but I'm not sure.
He's kinda cool but different than tube anenomes I've had before. His body seems solid and I don't think the head retracts into it.
LOL, upscale aiptasia. It does look like some sort of aiptasia to me. Not your usual run of the mill aiptasia though (although I wouldn't expect something so pedestrian in your tank, Dennis! :lol:)