@Toiletcar The tank isn't that crowded, aside from the panamensis there is one H. tamasopoensis who is the "tank boss". But the pair has now challenged him and they have been fighting a bit.
yes, now we should probably stop derailing hah
Watching things now, I think my rostratus is the culprit. Since my large robertsoni passed, she moved up as the dominate fish. And she’s more aggressive than the robertsoni too. But just chases and focuses on the deppi more than anything else. I guess the point is a dominant fish can prevent others from breeding. Perhaps when our fish get bigger that could change.
But I have heard panamensis can be quite aggressive,
Another point is one reason my rostratus is aggressive is because I’m not keeping a group of them.