I think my baby betta has this. He is having some difficulty swimming and looks to be pretty bloated. I know he ate a lot yesterday because I accidentally gave him too much food and he ate quite a bit before I could remove it. I knew it was too much and was working on removing it but he is pretty quick. I haven't fed him today and gave him a betta leaf hammock right near the surface which he has been resting on. Otherwise he seems to be acting normal. He swam right over when I fed the other betta, hoping for some food, lol. Anything else I should do for him or do I just wait it out. I can go out and get something but it will have to be this evening as workers are here now installing a new AC unit and I can't leave. Right now he is in a divided 10 gallon with another betta. Temp is 78. Do I need to remove him and put him in the hospital tank?