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Green Sunfish

Green Sunfish

Green Sunfish are one of the most widely distributed fish in Iowa and the most wide-ranging sunfish species. As a pioneering species, they're often the first fish to colonize new farm ponds and repopulate streams after droughts.

Scientific Name: Lepomis cyanellus

Physical Characteristics:
  • They feature a thick, elongated body with a distinctively large mouth that extends to about the middle of the eye when closed - larger than most other sunfish.
  • Their coloration is bluish-green with emerald and yellow reflections, white to light yellow belly, and characteristic dark spots on the ear plate, dorsal fin base, and anal fin base.
  • Green sunfish rarely exceed 6-7 inches in Iowa, reaching up to 7 inches by their fourth year.

What to know

Habitat Distribution

  • Found in every watershed in the state, inhabiting diverse environments from small muddy creeks and weedy backwaters to overflow ponds, shallow lakes, impoundments, and the margins of low-gradient rivers.
  • Their exceptional tolerance for turbidity, siltation, low oxygen, temperature extremes, and variable flow allows them to thrive where other sunfish cannot survive.
  • They're particularly well-adapted to Iowa's small streams with intermittent flow that become stagnant pools in late summer and fall.

Key Locations

  • Clear Lake, West Okoboji, Spirit Lake, Coralville Reservoir, and countless farm ponds.
  • Found in every watershed in the state, including the full length of the Mississippi River.

Specific Spots

  • Target areas with cover including vegetation beds, submerged logs, rocks, docks, stumps, undercut banks, and weed edges in shallow to moderate depths.
  • In lakes, fish near shoreline structure.
  • On streams and rivers, focus on pools, slower sections, and areas with cover.

Green Sunfish FAQ

Answers from onWater's species guide.

What are the best lures and bait for Green Sunfish in Iowa?

Live bait: nightcrawlers, waxworms, red worms, mealworms, bloodworms, crickets, and small minnows. Artificial lures: small jigs (1/64-1/16 oz), tiny spinners, small flies, poppers, Johnson Beetle Spins, 1/16 oz Rebel CrickHoppers, small tube jigs, or Crappie Magnets.

What flies work for Green Sunfish in Iowa?

Small patterns (#10-#18) including Frenchie Egans, Zebra Midges (black and red), Bully Bluegill flies (chartreuse color particularly effective), small poppers, spider mimics, or Bream Madness patterns.

When is the best time to fish for Green Sunfish in Iowa?

Spring through fall in Iowa, with peak action during late spring and summer when they're most active. Avoid fishing during spawning (mid-May through June) to protect reproduction.

How do you catch Green Sunfish in Iowa?

Live bait fished under a bobber or with split shot. Target areas with cover in shallow to moderate depths.

What do Green Sunfish eat?

As opportunistic feeders, they consume zooplankton as juveniles, then switch to aquatic insects, small fish, minnows, small crayfish, and terrestrial insects that fall into the water. Their large mouth enables them to eat larger prey items than other sunfish.

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