The Gold fish is a bold artifact. It is obtained once you complete the mini-quest to Fish for a red herring. These fish do not swim and are not found in water, and are made of gold so they are pretty heavy. They sell for a good amount of coin, depending on what size your hero obtains as well as whether or not the item is gold-plated versus solid gold. If your fish can dance or sing, it will earn an extra 10 coins at the shop versus any that just sit on the counter and look pretty. Your hero will check his or her bag often to make sure they are really not moving around in there.