So these dwarfs are about 2-2.5 yrs old. They are 3-4". As you can see the adult has an adult face. They have been acting jiggy since last year. I could see courting behavior and a gender difference when they were "dancing." I have felt they were ready for some time. But I didn't expect them to produce youngsters without help.
I was told they would be difficult to breed. They are such darlins. I think they missed the one that died last year and decided to replace him. I hope they do it again!
I have 2 x S. petrocola and 6 multis. I hardly see the pets and seldom see the multis dance. They are all wid caught, whereas these lucipinnus are aquarium bred. I think that makes a difference.
But don't worry about doing anything right or wrong. Give them room to dance, good food and clean water. They will get interested and do what their species does.
I have done nothing special except take care of them and see them "happy."
You don't say how many you have. I think that makes a difference too. Like so many Catfish, they need to party!