Heya Bill!
That sounds really interesting!!! You'll have to give us an update in a few months. Your boy sounds like he could possibly be a "swallow" tail. (and no, NOT swallowed by a cichlid! :lol: ) They split off and can get a bit stringy, they also have the stringy dorsal fin. He probably isn't a ribbon fin because the males gonopodiums are a mile long and useless! (though there are AI techniques, but thats a whole nother topic)
The reason I asked is that I've got a female that is almost certainly a ribbon fin, I've never seen anything like it!! Her ventral fins are well over an inch long!!! An impressive feat given that she's a tiny female (so far). Personally I find it revolting, but I'm not one to pass up a challenge...
Would love to know how your reds develop!
I see sleepless nights ahead
Helene