Fish Species

Iowa Department of Natural Resources record categories, weight and length rules, and the official verification process for state catches.

Iowa public waters support over 150 distinct fish species, including native populations and successfully introduced types.

Iowa lacks an official state fish, but walleye thrive in major rivers and lakes like the Mississippi River and Rathbun Lake.

Most common fish species in Iowa lakes, including bluegill and crappie, with details on spring spawning habitats and gear.

Iowa fishing laws prohibiting the release of invasive species to protect native aquatic ecosystems and prevent environmental damage.

Zebra mussels consume phytoplankton in Iowa lakes, disrupting food webs and impacting native fish populations for anglers.

An invasive fish species is a non-native biological intruder that harms Iowa ecosystems by outcompeting native wildlife like walleye or bass.

Asian carp regulations in Iowa govern whether anglers can keep these invasive species after catching them in local waterways.

Jumping silver carp in Iowa lakes and rivers weigh up to twenty pounds, creating physical hazards and ecological threats.

Asian carp species in Iowa, including silver, bighead, grass, and black carp, disrupt native ecosystems and local waterways.