I have a 55 gallon tank and have Malawai Cichlids. I have one (I wish I could tell you what kind) fairly young, yellow with 3 orange spots on his anal fin. It appears that he has lock jaw. looks healthy and swims around alot but doesnt seem like he can open his mouth. When its feeding time he goes up to the top with the others but hasnt eaten in 2 days. He was a real hearty eater till all this happened. At one time I thought he would eat too much, now this happens. Anyone think he is a gonner or will this go away. Any help is much appreciated!