My avatar is actually Xiphophorus nezahualcoyotl. I do have the X. montezuma 'Rio Gallinas' (the mottled ones) as well as the standard blue-green X. montezumae.
Since I can remember, swordtails have been my favorite fish, so I try to keep and breed as many species/races as possible. Most livebearers, in fact, I love.
The X. nezhualcoyotl seems to be a little more difficult to keep and breed, in my experience. The fry have a nasty tendency to just decide to stop eating after months of success with flake and daphnia and other foods. Out of the last batch my late female dropped, there's something like a trio left. All of the other fish in the tank do fine, just not them. It's very frustrating.
THanks guys! I really appreciate the help you guys provided. Yesterday I noticed two of my badis turn SUPER dark and start messing around with each other using the back of their fins to touch one another. Is this a sign? They weren't biting one another. When i looked a little bit closer, they lost colors and swam away. Darn. O wells. I will watch these fellas and note their actions. Thanks again.