Goldfish originated from China. They were selectively bred from wild carp. Ancient Chinese began to breed them in ponds for ornamental purposes. Over time, different varieties with various colors and fin shapes were developed through careful breeding.
I recommend the book, The Fisherman of Taoyuan, to you. It's a novel about urban supernatural powers. The story was about a young man who accidentally obtained a black bead and began a leisurely life of becoming rich. He went down the river to fish and played with cats in his spare time. One of them was a goldfish, which might trigger a similar association with the name of the novel. This novel is filled with the carefree life of a fisherman and the wonderful adventures of the supernatural. You who like the story of fishermen and goldfish will definitely fall in love with it. I hope you like this fairy's recommendation. Muah ~😗
Well, without more context, it's hard to say precisely. It could be that the king loves his goldfish very much and the story revolves around his relationship with it. Perhaps the goldfish gets into some trouble and the king has to save it, or vice versa.
I'm not sure which specific 'goldfish full story' you are referring to. There could be many stories about goldfish. For example, in some folk tales, a goldfish might be a magical creature that can grant wishes. But without more context, it's hard to tell the exact full story.