ILLINOISDEPARTMENTOF NATURAL RESOURCES

J.B. Pritzker,
Governor|illinois.gov

Organizmy wodne

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Available Soon, the 2026 Fishing Regulations Guide

February 2, 2026 by Kathy Andrews Wright

Aquatic Organisms | Fisheries Pick | Fishing | Regulations

A small tan fish with a black stripe running down its side swims on a black background.

A Little Learning About Some Little Fish

February 2, 2026 by Kayleigh Smith

Aquatic Organisms | Fish

A close-up of two blue-gray catfish resting on the bottom of a pebbly stream.

Blue Catfish in Illinois: History, ecology and a growing fishery

February 2, 2026 by Gretchen Steele

Aquatic Organisms | Fish | Fishing | Rivers and Lakes

A brown fish resting on the shallow edge of a rocky steam.

Tiny Threatened Fish Species Re-introduced for the First Time

February 2, 2026 by Hugh Gabriel

Aquatic Organisms | Endangered and Threatened Species | Fish | Habitat Management or Enhancement | Rivers and Lakes

A red-eared slider turtle basks on a log in the water.

The Invasive Red-eared Slider

November 3, 2025 by Laura Kammin, Scott Ballard

Aquatic Organisms

A group of children at two long tables paint with watercolors. Some children behind the painters watch the process.
A beautiful bright partly cloudy sky is reflected in a river as a canoe with many passengers paddles by. In the background is a tree-filled shoreline.
On an early spring day, a group of people stand in front of a pond.

Responding to an Insidious Invader: Tackling a hydrilla outbreak

November 3, 2025 by Claire Snyder

Aquatic Organisms | Invasive Species | Rivers and Lakes

A long brown speckled fish hides under some fallen tree branches.

The Bowfin: Illinois’ Living Fossil

November 3, 2025 by Gretchen Steele

Aquatic Organisms | Fish | Fishing | Regulations

A man holds up a small black and tan mottled fish. In the background is a wetland with trees against a hazy blue sky. Overlaying the image in the upper right corner is a gray map of the state of Illinois with the counties outlined in black. Three white stars are located at the very bottom of the state.

Return of the Giants: The reintroduction of alligator gar to the Cache River

November 3, 2025 by Mark Denzer, Rob Hilsabeck

Aquatic Organisms | Fish | Fishing | Places to Visit | Regulations | Rivers and Lakes

A man wearing light blue gloves places a black and green medium sized fish in a cooler with water.

The Sport Fish Restoration Act Has Been Supporting Fisheries Management for 75 Years: Part 2

November 3, 2025 by Vic Santucci

Aquatic Organisms | Fish | Fishing | Regulations

A young woman holds up with both hands a large gray, tan catfish while standing on a boat near the shoreline of a lake. In the background is a marina filled with boats.

The Sport Fish Restoration Act Has Been Supporting Fisheries Management for 75 Years: Part 1

November 3, 2025 by Vic Santucci

Aquatic Organisms | Fish | Fishing | Regulations | Research

A researcher holds up a large fish with a long nose. She holds the fish with both hands while standing up in a boat on a large river. In the background a road crosses the river on a green bridge. A partly cloudy sky is overhead.

Why the Long Face: What is up with the big nose on paddlefish?

November 3, 2025 by Shasta Kamara, Cory Suski

Aquatic Organisms | Fish | Fisheries Pick | Regulations | Rivers and Lakes

An underwater view of large walls of invasive plants overtaking native vegetation restricting open water space for aquatic organisms to swim.

Be a Hero—Transport Zero

August 1, 2025 by Kevin Irons, Brian Schoenung

Aquatic Organisms | Habitat Management or Enhancement

Two people stand in a boat offshore from Chicago in Lake Michigan. The individuals hold up small net traps to catch crayfish. The Chicago skyline is on the horizon line in the far distance. A bright blue sky is overhead.

Appreciating Crayfish in Illinois

August 1, 2025 by Reuben Keller

Aquatic Organisms | Invasive Species | Research

A crayfish standing in a grassy area with its pinchers up ready to defend itself.

Mudbugs Matter: Our freshwater heroes

August 1, 2025 by Dusty Swedberg

Aquatic Organisms | Crayfish | Pond | Rivers and Lakes

A researcher sits in a boat. She holds up a small, long fish in a small net. On her lap is a log book for recording data. In the background is a green grassy shoreline.

Jawless Fish With Suction Cups, Meet the Lamprey

August 1, 2025 by Rebekah Anderson

Aquatic Organisms | Endangered and Threatened Species | Fish | Rivers and Lakes

Many white, gray fish leap out of a fresh water river. Three people stand on a metal boat. One man and one woman use nets on long metal rods to net the fish. In the background is a shoreline filled with green vegetation and trees.

Monitoring to Manage: The Multi-Agency Approach to Invasive Carp in Illinois

August 1, 2025 by Brandon Harris, Michael Spear, James T. Lamer, Andrya L. Whitten Harris

Aquatic Organisms

A group of people stand together on a wooden dock over the shoreline of a freshwater lake. On either side of the dock is a metal boat filled with wooden boxes. In the background is a woodland with a road winding through down to the dock.

Building Better Catfish Habitat One Nest Box at a Time

August 1, 2025 by Danielle Shubat, Eden Effert-Fanta

Aquatic Organisms | Fish | Habitat Management or Enhancement | Pond | Research | Rivers and Lakes

A gray fish jumps up a small waterfall. In the background is a stream bank.

The Great Lakes Fishery Commission and the State of Illinois: Working together to better the Lake Michigan fishery

May 1, 2025 by Christina Contreras Stone, Lauren Holbrook

Aquatic Organisms | Fish | Fishing | Regulations | Rivers and Lakes

Odkryj naszą rodzinę stron internetowych

A link the Wildlife Illinois web site with advertisements for its four sections: Help, Sightings, Wildlife Identification, and Prevent Problems.
A link the Hunt Illinois web site.
A link the CICADA web site.
A link the Living with White-tailed Deer web site with advertisements for its three sections: ecology, management, and history.