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Blue Catfish

Blue Catfish

Blue catfish are Iowa's largest catfish species and among the largest freshwater fish in North America. They are migratory 'big river' species that were formerly abundant near Keokuk but have declined due to dam construction.

Recent stream sampling has found very few individual blue catfish, indicating they're more common in large rivers than interior streams.

Scientific Name: Ictalurus furcatus

Physical Characteristics:
  • Capable of reaching over 100 pounds and 53+ inches in length.
  • They are blue or slate-gray above and light below, with no dark spots characteristic of channel catfish.
  • Key identifying features include 30-35 anal fin rays (versus 24-29 for channel catfish), a deeply forked tail, protruding upper jaw, and a distinctive wedge-shaped profile.
  • Adults commonly reach 20-25 pounds with occasional giants approaching 100 pounds.

What to know

Habitat Distribution

  • In Iowa, blue catfish have extremely limited distribution - they're found almost exclusively in the Missouri River along the western border and the Mississippi River along the eastern border, with rare occurrences in the lower Des Moines River.
  • They prefer large rivers with moderate to swift current, main channels, and firm substrates of bedrock, boulder, sand, or gravel while avoiding silted bottoms.

Key Locations

  • Target the Missouri River from Council Bluffs to the state line and the Mississippi River, particularly around Keokuk and Pool 20.

Specific Spots

  • Focus on deep holes (30-45 feet) with swift current, outside river bends, wing dam tips, and areas below dams where wounded baitfish are available.
  • Fish structure like log jams, rock piles, and deep channel edges, especially areas with mud bottoms that retain heat.
  • During winter, target south-facing banks and areas with firm substrates.

Blue Catfish FAQ

Answers from onWater's species guide.

What are the best lures and bait for Blue Catfish in Iowa?

Prime baits include cut skipjack herring, fresh cut shad, and large chunks of oily fish.

When is the best time to fish for Blue Catfish in Iowa?

Best from late fall through early spring, particularly December through March, when large trophy fish are most active and accessible. September is also excellent as fish feed heavily before winter. Avoid fishing during spawning season (June-July) when males guard nests and don't feed actively.

How do you catch Blue Catfish in Iowa?

In heavy current, use enough weight to maintain bottom contact and position baits in current breaks and slack water pockets between fast flows. Multiple rod setups allow covering different depths simultaneously. Keep hook points completely exposed when using circle hooks.

What do Blue Catfish eat?

They're opportunistic omnivores feeding on aquatic insects and larvae, crayfish, worms, frogs, freshwater mussels, fish, and other available organic matter. Adults primarily consume fish and are one of the few species capable of eating adult Asian carp.

Where do Blue Catfish live in Iowa?

In Iowa, blue catfish have extremely limited distribution - they're found almost exclusively in the Missouri River along the western border and the Mississippi River along the eastern border, with rare occurrences in the lower Des Moines River.

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