Female Betta fish do not make bubble nests.
Yes! Betta fish males can make bubble nests whether or not a female betta is present! Male bettas make nests when their home are in proper conditions and they are ready to breed.
Male Betta fish make bubble nests when they are happy ^^ I have only had male Betta fish and after a day or two of playing with them and feeding them or even just talking to them they make their nests to show you that you made them happy.
Male beta fish are very territorial. Two male beta fish cannot live in the same tank or they will fight. Male betas make bubble nests to mark their territory.
it looks like they have a big bubble in their side
It probly is a female
that is how they build their nests for their eggs to hatch
yes
Water temp is the key, bettas are a bubble nest builder, that does not mean they will constantly build nests, its important if the fish is alone "to build a nest" that there are no sudden water temp changes, and the fish is living in some what of clean water and is being fed, the short answer to your question is no I would not be worried. the fish is no different than anything else it moves on an then goes back to what it species has done forever. One other thing that has come to my attention or thought, the betta that you have is a mature male betta.
Go to petsmart and ask a person there to show you witch is best for your baby betta fish.
i dont now
Male bettas blow bubble nests as a natural nesting behavior, not only as a response to the presence of a female. The act of building a bubble nest helps them prepare for potential breeding opportunities and is tied to their instinctive reproductive behavior.