Cichlid aggression prevention is a very important topic when it comes to these tropical freshwater fish. If certain cichlids are allowed to be bullies in the tank this can cause undo stress on the other fish and may cause a rise in disease and death. That would not be good!... Cichlid aggression prevention is a very important topic when it comes to these tropical freshwater fish. If certain cichlids are allowed to be bullies in the tank this can cause undo stress on the other fish and may cause a rise in disease and death. That would not be good!...