It does look like they are working on a spawning rise, but not quite going for it. Cool! I'm not sure if they are sterile or not, but that wouldn't stop them from trying. Same like mules (horse/donky hybrid) are sterile, but they will still try! Actually, as far as I know, not
all mules are sterile, but most are.
I'd love to see more pics/video of your tank! I'm going to go search and see it you have a Tank Journal.
