Longnose sucker found in Castle Mountain Ranches

October 16, 2026

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(Catostomus catostomus), a native cypriniform fish, was recorded September 15 in the Castle Mountain Ranches area of Gunnison County.¹ Suckers are habitat generalists found across cold and cool streams throughout North America and are less pollution-sensitive than mayflies or stoneflies, but their presence in a clean-observation grade record signals baseline aquatic conditions suitable for native fish.¹

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