Many biologists (myself included) don’t anthropomorphize animals because it’s impossible to objectively quantify things like “culture”. So, my opinion is that some fish change sex, and not their gender (because fish don’t have genders, which are human social constructs).

Happy to be corrected if I’m off-base. I’m not an ichthyologist.

Looks like a side blotched lizard (Uta stansburiana) to me.