The Official Colorado State Fish

Greenback cutthroat trout (Oncorhynchus clarkii)

Oncorhynchus clarkii, commonly known as the Greenback cutthroat trout, is a species of freshwater fish native to the Rocky Mountain region of North America. It is easily recognized by its vibrant colors, with a greenish-blue back and distinctive red-orange slash marks on its throat. This species is known for its resilience and adaptability, surviving in a variety of habitats ranging from high mountain streams to lowland rivers.

One of the most interesting facts about the Greenback cutthroat trout is its historical significance. It is the only trout species native to Colorado and was once abundant in its mountain streams and rivers. However, due to overfishing and habitat destruction, the population of Greenback cutthroat trout declined dramatically, leading to its designation as an endangered species in 1973.

Another fascinating fact about this species is its unique reproductive behavior. Unlike other trout species, the Greenback cutthroat trout does not migrate to spawn. Instead, it spawns in the same stream or river where it was born, making it a crucial part of the local ecosystem.

In 1994, the Greenback cutthroat trout was officially designated as the state fish of Colorado, making it a symbol of the state's natural heritage. This recognition brought attention to the importance of preserving this species and its habitat. Through conservation efforts, the Greenback cutthroat trout population has slowly recovered, and it was delisted from the endangered species list in 1977.

Today, the Greenback cutthroat trout remains a beloved species among anglers and environmentalists alike. Its presence in Colorado's waters serves as a reminder of the state's rich biodiversity and the need to protect and preserve it for future generations.

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