Definitely a bloated fish. I've had Cheep-Cheep for a year, and prior to moving in with my boyfriend I would be gone for most of the weekend o my bettas got at least one day fasting. Once I moved in with my boyfriend, they were getting double attention (me and the boyfriend) and Cheep-Cheep got a huge belly like yours. It was my boyfriend who suggested we do a once-a-week fasting for all 3, and his stomach went right down. I'm now on my own, but I still keep up with the fasting, and all of them are healthy and active.