according to zeal, he doesn’t care lol. he said that the angler bulb is more for aesthetics, since he thought it would be cool for him to use it like an old lightbulb when showing you docs, but he doesn’t care if you headcanon seb as trans
Lore spoiler I guess I'm unsure since according to the lore, he's a hybrid experiment which includes a female angler fish, shark and a few other sea creatures. I believe they were trying to give humans gills but he kinda just became that after the experiment failed