It's a shame,Ramshorn's are cute little snails that look anywhere from kind of spotted ,to brown,to almost red looking.They don't get a really big size either,but one snail is just never one snail.If any are still in your Goldfish tank,chances are that the goldie's will find them and eat them.Keeping that one though will eventually have you swimming in snails.It may take a few months,but it will happen.You'll end up finding them everywhere,including the inside of the filter.They're very hard to eradicate once you let them start breeding.