It started around the time that snapshots for the Caves and Cliffs update were being released. People joked about how the raw copper sprite looked like raw salmon. I made a parody of an Among Us intro scene (“Raw Copper: There is one Raw Salmon among us”), and Copper Fish was created. Later on, the creator of Copper Fish turns all the minerals into fish, and I suggest giving them roles.
That’s a brief history of the fandom before it started expanding off of Scratch.