Hi, We are beginners at the aquirium thing, we have had ours set up for about a year now. Today I noticed one of my blue africian chiclids has his mouth stuch wide open. He also looks a little non energetic. He wa healthy a couple of days ago but he seems different now. I took him out to check to see if there was a stone or something stuck in there but there was nothing. There are 5 other chiclids in the tank and they all seem very well.