My male was in his little holding tank for a couple of days until he got tired of it and jumped out (the rim of the tank was above the common water level). He never tried to make her a bubble nest or anything. It was suggested by other betta breeders that since I got him from Petsmart and he was older when I got him (longer finnage, etc), that he was a retired breeder and had had enough of it, so he just didn't want to. IDK, though.