Does anyone know when Congo Tetras start to develop their elongated fins? Because I have had mine for over a year and they haven’t grown yet. I have 2 males but still aren’t growing them yet.
HI and welcome to fishlore!
How big are the Congo's?
What size tank do you have?
I have a school of 7 Congo's in my community tank that are about 9 months old and all of them have their long top fins and tail extensions.