Hello I've been looking for information on this, and couldn't find any. So I was wondering what other betta fish owners opinions are....
My male bettas are housed next to another in separate tanks with an opaque divider between them, so they don't stress themselves out. They definitely know when the divider is removed, because they flare at each other. But sometimes when the divider is between them, they mirror movements.
So when the divider is up, do they still know they're housed next to each other?
Does that make sense?