Should you feed goldfish in a tank during winter?

Most hardy types of goldfish can survive at a temprature close to freezing.
Perfect temperatures are 68-70 degrees F, however, they can handle, for short periods of time, temperatures up to around 78 degrees F, but can handle for extensive periods of time, water down to 33 degrees F, or just above freezing. Of course, when the water drops below around 50 degrees F, feeding should stop as the goldfish goes into a sort of hibernation and does not eat.