I work at a LFS and I see this all too often. Many people, unfortunately, learn the hard way. I've dealt with many "carnival goldfish" horror stories which usually end in a crying kid and a frustrated, confused parent (with a bit of guilt). I wish I could say that everyone learns from their mistakes with this situation but I'd be a liar. Some learn, some refuse to listen to our screams that a goldfish CANNOT live in a bowl and do it anyway, only to come back a week later and ask 'why?'. Rarely you'll get someone come in who knows what goldfish need and have an adequate tank/ pond to support them. Anyway, kudos for you for doing your do-diligence and researching later on. Not everyone learns so easily.