Fin type and coloration platy

Hello again! Back here with my platies, so I've noticed a few of my males have a curved dorsal fin. Also I'm curious as to what fin coloration one of my others is.
The one on the right is the one I want to know about the fin type, the one on the middle left is the fin coloration. I read on one thing that spots on the dorsal fin are rare, wondering whether or not that is true. Thanks for reading this and any replies.

 

I think the left ones are the hi-fin platy.

 

Thank you! I was curious though because I have some other hi-fin platies that don't have the curve. Any idea if it's a certain type of hi-fin?

 

Thank you! I was curious though because I have some other hi-fin platies that don't have the curve. Any idea if it's a certain type of hi-fin?

I am not sure but it could be black variatus in origin.

 

Thank you!

 

Thank you!

Welcome.