where they come from is a swamp that is much over grown with weeds, they clear a pocket in the weeds then build a bubble nest and wait for a smaller female to squirm through the weeds to there nest area.
they like quiet, most fish do prefer it and a single betta can usually get enough air in his water from the surface area exchange, they do not need pumps and it is easy to keep them in a small container to keep up on water changes