Betta Fish: Why does my new Betta look like a raw chicken breast?

Just brought home this interesting little girl(?). She was labeled as a palkat male but looks more like a female. She looks sick at first glance but I think she may just be leucistic. She does seem to struggle with swimming but otherwise seems completely healthy. She's eating and exploring best she can, seemingly unaware of her own struggle. I've got her in a 2.5 gallon tank with plenty of resting places at each level to give her the best life I can. I'm really curious to see if she ever colors or stays a little filet. Any ideas on her looks and condition?