No, golden trout is very different from koi fish. Golden trout, a Pacific salmon belonging to Salmonidae, is a golden yellow strain selected from the mutant of Japanese rainbow trout. He is a cold-water fish with small scales and no beard. He is a spindle-shaped edible fish.

Koi fish (scientific name: Cyprinus carpio), an animal of the genus Cyprinus, is an advanced ornamental fish with the reputation of "a living gem in water" and "a swimming work of art". The length of koi fish can reach 1- 1.5m, which is distinguished by different colors, patterns and scales. Mild temperament, gregarious, easy to raise, strong adaptability to water temperature, belonging to a wide temperature fish. The scales are large and spindle-shaped.