My sister has a female crowntail betta and it is in a 1/2 gallon tank with marbles and a artificial plant. When she bought it it was tiny. Now it's gotten bigger but it's belly is huge! When we got her it was normal (we couldn't tell real good because she was tiny). So is she pregnant or what? My sister overfeeds her so she's fat but it looks like her stomachs going to explode! She feeds it 8 pellets in the morning and 8 at night which everyone tells her is too much. She goes to her friends house often and we don't feed it when she's gone so she can digest all those pellets if it eats them all! So is it from being overfed and being fat or pregnant? It doesn't look natural like it's just fat because it's skinny but it's belly is an unnatural size. Thanks and we've had her for I think like 3 weeks.