Here is a brief (not) history of the development and addressing some questions.
My foundation stock 4 years ago:
I was not too concerned with color, rather size and finnage and structure to support fins. I wanted them to look like bettas, not Show Guppies.
They were picked from a LFS that is no longer is existence. However, when getting feeder guppies for a sunfish, there was this cool large Endler in the mix. It bred with one of my females, and I got these (Not the sword):
I didn't really want Endler in the mix, but he gave high extended dorsals, sturdiness, and longevity. This original Edler mix/hybrid is the last remaining one I have. The pic was taken recently. Yes, he is 3 1/2 years old!
Breeding him and his siblings produced some er...mishaps:
I took select fish for their length, dorsals, and strong peduncles. I choose L O N G females. I know the plain Jane females are more desired to breed, but I chose ones that looked like males, which is why I probably have more females than males in my broods (?) Male w/Female underneath.
Thus, Chocolate Cherries were line bred:
And Frosted Cherries (Dilute Chocolate Cherries):
I was not concerned with color, but wanted new blood/outcross, so earlier this year I got high fin extended dorsal Blue Grass Metalheads. They are a little smaller than my lines, but had the finnage. Bred them with the CC's and got these:
Bred these "muddled" mood-rings (colors change overnight) back to the darkest CC and metalheads I had, and thus the Rorschach was born. Fry from these are what I am now currently working on. (2nd generation)
Breeding extreme finnage is a man made desire. These fish would never survive in the wild. Like a persian cat to a cougar, or a pug to a wolf. If you house them with fin nippers, it's like throwing a fishing lure to a bass. However, they are hardy and have no problems swimming, and hold their own. The body form and endler influence contributes to that. They are not the skinny-waisted/big bustle tail variety. The older ones do tend to "rest" on plants like a betta. They are not aggressive like a betta, and like most male guppies, constantly display and dance. No bent spines, unless geriatric or old timers. All my fish are kept in planted tanks.
Mobility/breeding ability is not an issue: