This is Aeris, my female betta:

Just a quick question: i rmbr someone posted abt their male betta changing sex to become female. Can the same happen vice versa? I'm asking coz i noticed Aeris' pelvics are growing longer, her ovipositor seems to be shrinking and overall body becoming slimmer? For reference this is what she looked when i got her just over five weeks ago:


Or am i just crazy? She's quite small but she's grown a little, so i was thinking maybe coz she's young her chromosomes may not be so stable or smt?