How long do clownfish normally live? Because I have a five yr old black clown, that is in serious distress. He has never been sick and as of late last night he was eating everything still.. pellets and mysis. This morning he cant breathe and it actually looks like he has a mucus in his mouth thats preventing him from breathing and he has started to bob and weave. If anyone has any ideas I would appreciate it. A fresh water dip may be too stressful thats how banged up he looks. Im bummed