虹鳟, also known as rainbow trout, is a species of freshwater fish native to North America. It is recognized for its vibrant coloration, featuring a pink stripe along its side and a speckled back. This fish thrives in cold, clear streams and lakes, making it a popular choice for both anglers and aquaculture. In addition to its ecological significance, 虹鳟 is widely consumed as a food source. It is often farmed due to its high demand and is known for its mild flavor and tender texture. This fish is also a common subject in recreational fishing and is appreciated for its fighting ability when caught.