Umm betta's in the wild live in rice paddies, yes. But rice paddies are huge. We seem to discuss this every so often here. Rice paddies aren't small puddles, though they are shallow by human standards.
As for what to keep in a betta bowl, how about goldfish crackers. They are transfat free.
As for what to keep in a betta bowl, how about goldfish crackers. They are transfat free.