Tips to getting the right GoldfishGoldfish are a temperate breed that can be found in cool streams, lakes, and ponds throughout Asia and part of Eastern Europe. However, the ones you will buy for your tank have been bred in captivity. Once you’ve decided that the Goldfish is the right one for you – you will need to find the right kind of goldfish. Take your time and find out more, rather than just rush out and buy the first goldfish you find in the first pet store you come by. Decide on how many.