I have a pair of Trilineatus cories which have bred repeatedly in my tank. Not all the fry survive, but last summer I had to catch 7 of them to give to a LFS for credit as that was too many for my tank.
It's likely they spawned before the other died and you are just now seeing the results.
i just remembered that I took a piece of driftwood out of my main tank and placed it in the tank about 4 days ago. I do have ottos that breed often. not many survive because they usually get eaten. so, the eggs could have been on that wood.
Man, I would be more thrilled about the otos than the corys. I had 3 otos for 8 years and they have yet to spawn. How did you do it?
My corys do spawn, not enough to make me rich, but they do, so I l know they are happy but I can't get the otos in the moode.
sorry for the delay in responding. no power due to the damn hurricane!
i dont do anything special for the ottos to breed. I dose dry ferts, high co2 and tons of plants. it was just a lucky situation that i moved the drift wood.
its been four days and now I see 5 baby ottos. still alive but not sure what they are eating...