I call her Big Bertha. She's by far the biggest of all the tetras in my tank. There was a period of time when I caught her flashing a little bit, but haven't really seen that recently. Nothing else seems to point to a parasite of any kind. Don't notice any abnormal poop. No signs of dropsy or anything. Hearty appetite, of course! Should I be concerned that she is so gigantic? Even when you look at her from behind, her sides are much more bowed out than the other tetras' sides. Just a fatty? Or should I be concerned?