I have a goldfish... It's around eight or nine years old. An ex-flatmate moved out and left it in my care... I'm a terrible fish owner. My anxiety makes it very hard for me to clean the tank. It keeps on living, anyway. It's an extremely hardy creature. I honestly think it could survive an apocalypse.
...and yes, I feel guilty for how bad I am at caring for it. I have made various attempts to pass it off to someone else. No-one wants it. I think I might be stuck with it forever. The immortal goldfish.
Poor thing.