Chromis Jaw Problem.

[Wayne]

Umm weird I hope that he is ok and thats just a "thing" that will go away.

[spawn]

Some of mine do that too. I've never paid attention to it really, but now that I'm thinking about it I think tomorrow I'll try & see if it's the smaller fish, I've got 5 of them, their all about the same age but 2 are way smaller than the other 3. That could just be a dominance thing though.

[whatcaneyedo]

I've heard of fish getting 'lock jaw' from poor diet and experianced it once myself. It took me a month to get my last volitan lionfish to eat frozen food. To wean it over I kept it very hungry by only feeding it a couple of guppies each week. By the time I got it to take silversides it was having a difficult time opening and closing its mouth. I was able to find some more information on it by looking around RC.

Do you offer your fish variety and feed it often? If not this may be the problem. But if you do then I have no idea.