Question by Josh: Whats this black streak on my killifish? and cory breeding!?
Sometimes it is there and other times it isn’t!!?? Is this a sign of stress? Is it meaning it’s ready to breed or something? Also, I have put a spawning mop in the tank and I see the corys go up to it, does this mean they are breeding? THANKS! 10 points best answer
Also, how do I stop aggression ? My one killi chases the other one.

Best answer:

Answer by dipzee
I’m not sure about the mop but when my cories spawn they go crazy swimming all over the tank and they lay the eggs all over the place, on leaves, on the cave on the tank glass, behind the heater etc…

No Idea about the killifish though sorry.

What do you think? Answer below!