Originally Posted by indjo
Your first post suggests that your goal is to produce as good form as possible. ..... so here goes;
IMO, your girl has relatively balanced fins. Unfortunately her fins are far from perfect. In general she has rather small/slim webbing which makes them look rather small. You want the dorsal to meet the caudal - which in her case is rather round. You want her caudal to form a "D". But her anal fin is balanced to her caudal and thus form a circular pattern from dorsal to anal. IMO her fins are better than her sister's.
Attachment 49680 Attachment 49681
The second picture shows what you're after - your breeding goal (if you want to improve her fins. This is the general "ideal" form for modern long fins.
Her color is irid based (green) so you could pair her to another irid color (blue or green) or to irid based metalic like copper and platinum. You can even pair her to a black lace since this color shows irids as well. I do not advise pairing her to a red, because you will have a hard time separating the 2 colors in the future. As for marbles, pair her to any color, you should get a few marbles in fry.
Thank you for the info :) I see what you mean about her fins, i did think she looked better than her sister. I had already considered her caudel and agree that getting a "D" shaped spread was a primary goal. I didn't think a red male would be a good pairing for the reasons you stated. While reading about betta coloring, I learned that iridescent scaling comes from a blue base, but I didn't know if copper or other metals would be a good match as well.
: I thought this male could potentially be a good pairing. He has a better caudel than my female, though his rays look a bit short to me.
: I like this male better, I like how well defined his caudel rays are, but his tail doesn't make it to the "D" shaped.
I don't currently see any CT males on aquabid that have an exceptional form. The rays are too messy, or have a small spread. I've been looking at new crowntail auctions almost daily, for months, and none of them I've seen have been worth the cost plus shipping.