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As the reservoir's most sought-after species, channel catfish are present in good numbers weighing 2 to 8 pounds and reaching up to 15 pounds, while flathead catfish show moderate numbers dominated by 10- to 15-pound fish alongside trophy potential up to 50 pounds. Largemouth bass continue to improve in both size and abundance, with most measuring 12 to 17 inches and topping out around 20 inches. Bluegill numbers and sizes remain mediocre. Crappie populations are down from last year, though black and white crappies typically measure 9 to 12 inches with larger individuals available. White bass numbers remain low following a die-off over a decade ago but are beginning to show back up. While walleye and wipers are stocked annually, they prove difficult to locate and catch as many wash through the dam outlet into the Iowa River below. - Last updated on 09/11/2026.
In nearly all cases, Iowa fish are safe to eat. Cleaning and/or preparing the meal causes most of the problems regarding taste or color of fish. Like all living creatures, fish are susceptible to diseases, parasites, and other naturally occurring conditions in the water. If you suspect your fish is affected by any of these conditions, do not eat it. Consider eating smaller and younger fish which usually have lower levels of contaminants than larger ones. Most contaminants accumulate in larger, older fish. For additional information, check out our resources for eating and cooking Iowa caught fish.
To learn more about fish tissue monitoring, visit our Fish Tissue Monitoring page .
The summaries listed below are a partial listing provided for your benefit. Familiarize yourself with the complete Fishing Regulations here: Iowa DNR Fishing Regulations and Laws.