Their culture is as complex as human culture. I would not be shocked if there's trans Orcas. There's just not really a way to know.

What's cool though is that the portion of their brains associated with empathy is massive, so there's this question of how Orcas think about their pods, whether they have bounded egos. This further complicates gender: what does gender mean when you're just one component part of a multi sexed pod?