Underweight: the head will be wider than the fishes body
Overweight: the fishes body will have a disproportionally large pot belly (please note that certain kind of fancy goldfish such as ranchu,...
You can tell if your Body Mass Index is above 22.5 and your body is mainly fat not muscle. If you are female, no more than 18-20% of your weight should be fat. If its more you are over fat if it is...
Your friend probably is not normally overweight. Overweightness comes with some sort of a habbit. Lazyness, eating heavily or not being social contributes to being overweight. If she is your friend...
For overweight there are not that many disadvantages compared to underweight, however obese has much worse things then overweight, but being underweight is very bad compared to obese. Overweight...