defect

So I have 2 BPS who seems to be missing their dorsal fin and I've seen quite a few videos where the BPS do have their dorsal fins. The store I got them from only had the kind without their dorsal fin. Is this a defect or were they chopped off? If you need a pic ill post one once I'm home.

Just wondering if anyone knew if a red head on a JD was anything significant. I did some research and found nothing on the subject, and had never seen a JD with a red spot this prominent on its head. The fish is only about 3"".