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.
Somewhat related—oldies stations are like this, except with “new” songs entering the rotation periodically. Of course, when the end of the year rolls around they play the “Top 100 songs of the year” which are essentially the same set of songs in a haphazard order.
I didn’t mind it so much because it was much better than listening to the low hum of showcase coolers of a mom-and-pop grocery store. However, it was pretty jarring when I heard them play a song I distinctly remember hearing on the radio as a kid riding in the back of the van getting dropped off for 1st grade (or some such young age)