Eventually, I gave up and packed up the fish bowl. Since then, as I mentioned, the aquarium has closed and been turned into a cafe that does killer breakfasts. I'm a bit of a regular there now, and on one recent visit I found myself remembering all the fish that used to be there. I imagined their little ghosts swimming around the heads of the customers; an idea that I found a lot more cute than creepy... Anyway, that was what inspired this sketch.
EDIT: I forgot to mention that my ultimate favourite variety of goldfish were the pearlscales, AKA golfball fish. They are goofy little fish that are shaped like golfballs (as if that wasn't self-explanatory), and I LOVED them, so they are the fish you see here.