I purchased a pretty little gold severum today after I returned my jack dempsey. This severum is healthy, active, and eating within an hour of acclimation. I noticed that it has a defect on one of its gills. The gill has an indentation below the eye and the edges of the plate stick out a bit. The defect has caused its mouth to look a little funny. Is this a common defect or likely the result of an injury as a younger fish. It is about 2.5 to 3 inches right now.