Originally Posted by homegrown terror
the only possible answer i can think of is that wild bettas, living isolated in small bodies of water, might instinctively know that a coming storm will mean floods, which could wash a potential mate into their home, and want to be ready when she arrives.
You do realize that bettas don't live in small puddles..
They live in rice paddies, swamps, wetlands, and shallow ponds
. These bodies of water, though shallow, are quite expansive; rice paddies typically span many acres. Some places their waters can go on for miles. There is nothing "small" about their homes except for during the dry season where the water can become smaller.. but between May until October they are in Monsoon season which means a ton of rain.
So some areas may be shallow, but not small.. no "washing of potential mates" as it doesn't work that way.. females will travel all around the acres/miles visiting different males as they go. They don't just live in rice paddies.. (each segment of those are often very large).