I need help I have an african cichlid tank In that tank I have many different mbuna cichlids but the one I need help with are my 2 melanochromis chipokae one blue and one yellow the yellow one is turning a bluish brown and vibrates especially In Front of my yellow lab and the blue on is calmly just hovering at the top of the tank as if it was told to stay away! I noticed the blue one also is constantly changing from blue to like a grayish color and mouth more open than usual! Can some one please tell me what's going on !!!!!!!