Bubble nests are were the male betta stores the eggs after mating. A male making a bubble nest is one of the signs of wanting to mate. You do not have to breed them if you dont want to. Also, the male will gaurd the nest and will continue to add on to it.
Krall, VT Green and white dalmation R.I.P
Akrin, DT Red with orange fin edges
Zora, CT Blue with red fin tips R.I.P
Scuba, HMT Dark red with white fins R.I.P
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