Why are only some pipes on Live Aquaria marked as expert only? Is it just because they don't ship well? The expert only ones seem to have the same requirements of care as the non-expert pipes (like the dragonface). I'm wanting either Janss or Blueline but both are marked expert only which makes me worried that it may be a bad choice. Can someone please explain to me why those two are expert only but some of the other pipefish are not? Thanks!