It's very easy with ZZ a Kamfa however I never was successful breeding always shooting blanks at young age. All the kamfas I had are show pieces and I currently own one who's fertile but don't like him breeding with a Midas since he's a fader already and he mimics a Midas already haha
A lot of people who I sold my fish to send me videos and pictures of their fish breeding as well I'm pretty good at sexing Flowerhorn at a young age. One of my flowerhorns I sold was at 2" and he's breeding with another female I sold him at 4" and his kok is huge! They got wigglers I have videos but parents ate them.
I'm trying to get my costumers batch lol that line of fish have very strong genetics