The resolution designates the Iowa darter (etheostoma exile) as the official state fish of Iowa. This fish is unique as it is the only fish named after the state and was first documented in Iowa in 1889. The Iowa darter is known for its vibrant colors, growing to about two and a half inches long, with bright green bodies adorned with dark brown blotches and small red spots. It thrives in clean, vegetated waters, making it an important indicator of water quality and a symbol of Iowa's natural habitats.

In addition to its designation as the state fish, the resolution mandates that the director of the department of administrative services obtain and display appropriate representations of the Iowa darter in the state historical museum. Furthermore, the Iowa official register will include a picture and commentary about the Iowa darter alongside other state symbols such as the state rock, flower, bird, and tree. This resolution highlights the significance of the Iowa darter not only as a representative species of the state's aquatic biodiversity but also as a reflection of the resilience and adaptability of Iowa's residents.