I wanted to come back to this guppy again. The photos I took a few weeks ago were “ok” but I wanted to try and get some better shots. His pale yellow “high dorsal” fin continues to develop. When I posted photos of him on July 15, I had probably placed him in a breeding group a day or two before. On about August 7 or so, to my surprise, I looked in this tank and saw about 30 fry. These dates could be off 1-3 days, so it’s not an exact science around here. To my knowledge, those females haven’t been around any other males. Then again today, I noticed maybe 5 new fry in this tank. I’ll have to wait a few weeks to confirm “who’s their daddy.” But my hope is that I’ll get a good line of these high dorsals going.
Alan Bias emailed me about this “crossover” event. If I’m understanding what a crossover is, it’s a shuffling of the genetic/DNA deck. So it happens before your male/female cross, in the DNA of one fish, rather than a shuffle of DNA between a male and female guppy. This gives you a random, totally unexpected outcome which isn’t considered a mutation.
Regarding the fish above, Alan says: Yes, they basically are a Vienna w/o swords and clear roundtail from female X-link. He sent 5 photos to show examples from his fishroom.