How do betta fish communicate?

Answer 1

Betta fish can communicate through colors and body language. A betta fish can use fins to show it is ready to breed, and can change its skin to have black or dark vertical bars to show it is ready to breed. A male can communicate to other males to stay away by flaring it's fins and fanning it's gills at it's intruder.

Answer 2

Yes they do. All fish have a "lateral line" on each side of the fish. In some species this is broken up into two lines on each side. On/in these lines are a series of different types of receptors that pick up on any kind of pressure waves or vibrations. In a similar way our ear drums pick up vibrations and convert them into sounds in our brains. This is how your Betta hears and is also the reason why tapping the side of an aquarium and creating shock waves in the water can badly hurt/damage fish.

Answer 3

Yes of course, they grow accustomed to their owner's/master's voice. From the vibrations and surrounding of their environment.