I bought a goldfish a month ago and I have this goldfish in a bow down stairs in the kitchen bar. I was eating and then all of a sudden I heard a few sounds that i could not figure out where it was coming. Then it turns out that my goldfish was blowing lots of bubbles and it would pop so that was the noise that was coming from. I have had so many goldfishes and I have to say this is the only one that do that. I guess she's talented.