I thought bettas don't "need" air to suvive. I knew that they can breathe it but also from water. So why is it so important for them to breathe air?
While the gills are highly underdeveloped, they are by no means useless in drawing oxygen from water. If they were, Bettas would be forced to continually go to the surface and would not be able to sleep on the bottom as they do for hours on end. (And these are perfectly healthy when they perform such a task!)Originally posted by Quagaar
Bettas have highly under developed gills, which cannot draw oxygen from water. In the wild, bettas are commonly found in stagnant bodies of small water, with very low oxygen content, so this organ is the source of life for this fish, and other anabantoids. Vases are a barbaric practice performed on a beautiful fish, and should be banned.