I think this post started it. It’s a quote from “Werner”, an old german cartoon movie. The german word for sturgeon is Stör. But “stören” means to be annoying or disturbing. A lot of sturgeons got posted to c/ich_iel and it got really annoying. Because of that, Stör-memes are not allowed on ich_iel from tomorrow. Mission accomplished I guess.
Edit: Actually, this post started it. It’s a wordplay on the word Erster (first), but written Erstör.