I've been looking at the plakats on Aquabid. In the regular plakat category I see a lot of 2-ray (-branched caudal fin) fish, but mostly 4-ray and even a few 8-ray. A few in this AB category could be entered as HMPKs.
In the HMPK category on AB, while there are some 4-ray PKs, most shown are 8-ray with many 16-ray. Some appear to have even more--- like rosetail or feathertail PKs.
Are just the 180*-ness and crisp edges judged, without regard to the the number of rays in any of the single fins?
Are these backformed from HMs? Why would a PK need a 16-ray caudal?