I managed to get a couple of photos of one of the bigger fry from my Betta sp. apiapi pair. It is probably just over half an inch in size, and is starting to show some red colouration along the anal fin.
At the moment it still seems to still have a rounded caudal fin. However, I am not certain at what age or size I should expect to see development of a more spade shaped caudal in male fry.
Because this is a species I would really like to work with beyond an F1 generation, I am eager to see the ratio of males to females from this current population. With my coccina complex fish, I generally get a ratio of around two to three males for every one female. Therefore, my prediction is that it will most likely be male heavy.
This is why I really need to get my hands on a digital pH meter and a hardness test kit. It would be great, if I could figure out the water conditions that lend themselves to a more balanced ratio between males and females. This is because it's extremely difficult to keep a line going, when you only have a single female to work with.
Hailing from Melbourne, Australia, I currently keep and breed a number of species from the coccina complex.