She/He flares at snails on the glass, At the Kuhli Loaches , And even at Shrimp, She/He hardly ever glass surfs chasing its reflection, and I have never seen her/him flare at her/his reflection in the glass, I will get a mirror and see what happens.
If you look at the video in this post you will see how she/he spends the day, Its all about bubble nests cruising around the tank showing everybody who's the boss or swimming thru all the anubias menacing shrimp and looking for food. Oh well She/He seems happy and healthy so it don't matter what sex it is.
http
/www.fishforums.net/index.php?/topic/438937-my-new-betta-zsa-zsa/?p=3721386
