What are some good cold water pond fish? I know that goldfish are and koi are but is there any kind of other fish that can live in an out door pond and in cold water? Are ALL kinds of gold fish cold water fish? I am building a turtle pond and the pond is going to be around 100 gallons. Its 70% don so far. It might have a water fall not sure. Its going to have good filtration. Thanks! :feedback: