I'm sorry, but there was nothing too interesting about this. You didn't use that plot of talking about why they're called goldfish. There's so little going on. I guess the voices aren't bad. It just seems rather pointless. You're not building up to anything.
The animation could be better. I don't know if goldfish have cheekbones. I know little about fish anatomy. I used to have a bunch of fish. I named them all Fishy!