Do betta fish blink

Betta fish have a wonderfull varity of sharp teeth in the front to eat and to bite to protect its self and a place in the back to keep there babys eggs. and yes my betta fish bites anyting else but me and things in its fish tank because its used to me but if you get a betta fish i strongly suggest that you don't put your finger in its tank until its like almost 4 months in your care
It depends on the fish. Some do, some don't.
yes