How to Identfy Different Trout

Some species of trout change color during spawning season.

There are hundreds of species of trout throughout the United States. Although they are similar-looking, each has distinct features that can help people tell them apart. Not all species reside in all areas, and markings for trout species are often specific to a particular region. Identifying the trout you catch is crucial. Many species are endangered, and it is illegal to take them from the water if caught. Knowing which species of trout reside in your fishing area is an important start to identifying what's on the other end of your line.

Things You'll Need

• Fishing regulations, state-specific

Instructions

1. Search for your state's fish and wildlife website online, or go to a local office. Obtain a copy of the fishing regulations for the area you are planning to fish, and take them with you when you go fishing.

2. Look at the trout you catch, checking its color first, and refer to the fishing regulations to narrow down the species of trout that have colors similar to your fish.

3. Read the fishing regulations to see what major differences the similar-colored fish have. Compare the differences to your fish until you find a match. Look for variations like spots on the fins, color of the belly and any special markings.

4. If you are unable to identify it, take a photo of your fish and return it to the water, since it may be an endangered fish. Take the photo of your fish to a state fish and wildlife office or fishing supply store to inquire about its identification.

References

• Boulder Mountain Fly Fishing: Cutthroat Comparison
• Colorado Trout Hunters: Trout Identification
• Harper Creek Fly Fishing Company: How To Identify Each Trout Species
• Idaho Fish and Game: Fish Identification
• Teton Valley Lodge: Trout Species List

Resources

• U.S. Fish and Wildlife Services: USFWS Management Offices -- State, Territorial, and Tribal