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Orangespotted Sunfish

Orangespotted Sunfish

The Orangespotted Sunfish is one of Iowa's smallest and most distinctive sunfish species. These fish thrive in turbid, shallow systems with low oxygen content - conditions that other sunfish cannot tolerate.

They show phenotypic plasticity based on available prey, developing either elongated bodies with angled snouts for small prey or deeper bodies with blunt snouts for larger prey.

Scientific Name: Lepomis humilis

Physical Characteristics:
  • Characterized by vivid orange-red spots on males during spawning season and more subdued brownish-orange spots on females.
  • They have olive-colored sides with fine golden and emerald dots, a large mouth extending to the front of the eye, and a distinctive black opercular flap with white margin.
  • They typically reach about 1 inch by their first year, 2 inches by their second year, with adults maturing at 2 inches and rarely exceeding 4 inches in Iowa waters.

What to know

Habitat Distribution

  • Widely distributed throughout man-made lakes, natural lakes, and interior streams, though occasionally seen in the Mississippi River and rare in the Missouri River.

Key Locations

  • Spirit Lake, Coralville Reservoir, West Swan Lake S.W.M.A., pools of the Mississippi River (16-19), and various Missouri River sections.

Specific Spots

  • Focus on shallow, turbid waters including floodplain areas, vegetated backwaters, areas with fine substrates, and scattered cover like fallen branches.
  • They prefer vegetated areas in sluggish backwaters, floodplain pools, and waters with fine substrates like sand.

Orangespotted Sunfish FAQ

Answers from onWater's species guide.

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

Small jigs (1/32 ounce), tiny spinners, cut worms on small hooks, and beetle-spin type lures.

What flies work for Orangespotted Sunfish in Iowa?

Frenchie Egan's on size 14 hooks, Zebra Midges in black and red, small bead-head nymphs, Foam Ants, Micro Chubby Chernobyls with rubber legs, Bully Bluegill flies in chartreuse (particularly effective), and small poppers like Bett's Bream Madness.

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

Spring through fall when insect activity is high. Spawning occurs from May through August - avoid targeting them during this period to protect spawning activity.

How do you catch Orangespotted Sunfish in Iowa?

Present flies with minimal action - just enough movement to make rubber legs wiggle. Small poppers kept at or just under the surface with pulsing motions. For conventional tackle, retrieve slowly.

What do Orangespotted Sunfish eat?

Their diet consists primarily of aquatic insects (especially chironomids and corixids), crustaceans, zooplankton, and occasionally small fish.

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