Megatrev62
New member
Have a single banggai cardinal in a 90 gallon that is very aggressive to the 6 green chromis in the tank. Noticed this for the past 2 nights (very rogue with just actinics on). Tonight the aggression is insane. Will not give them a moments peace. Very weird. He/she has been hanging out in the right front corner of the tank. Is this just territorial behavior?, and if so what can I do about it? And why all of a sudden? I'm really concerned for the safety of the chromis at this point. Any help is much appreciated.