Maybe we are surprised, when we see there are bubbles in our betta fish tank. Don't be afraid, air bubbles are a nest for betta fish. One of the functions of these air bubbles is to lay eggs. Betta fish are comfortable with the water in the tank, so the betta fish will make bubbles as a nest.
Can bettas live in a tank without bubles ? Making bubbles is the instinct of the male betta fish. The male will make a bubble and declare that this is the territory of the male betta. Female betta fish rarely make bubbles. Maybe the female betta will help the male make bubbles when breeding.
Should we remove the bubble? Better just let it be. because naturally the bubbles are made by male betta fish as their nests. If we change the water, the male betta fish will make bubbles again and again. so if our male betta fish is already making bubbles, maybe we can think about finding a female betta fish as a pair.
So if we find bubbles in our betta fish tank, don't be afraid, because it may mean that our fish are comfortable with the tank we have provided. Don't forget to maintain the water quality of our betta fish tanks. One of them is by changing the water regularly.