Join Date: Feb 2012
Location: Hickory, NC (USA)
Not to burst the cuteness factor of it. This yawning is actually them flushing waters through their gills. It's perfectly normally as said before, but if they are constantly doing this it can be a sign of an irritant on their gills. Usually this would be accompanied by other symptoms and if a healthy fish is doing it I wouldn't worry. This would be just a hint to help you diagnose a sick fish and not a primary symptom.
Last edited by freemike; 02-24-2012 at 10:59 PM.