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Aquatic Nuisance Species (ANS)


What are ANS?

13OKFW-DS-ANS.jpgAquatic Nuisance Species (ANS) are invasive, non-native species that threaten the ecological integrity of aquatic ecosystems in Oklahoma. ANS can be brought into the state unknowingly by anglers and boaters who move their boats and equipment from one body of water to another without cleaning them. These species often have no natural predators and can expand their range and population size unchecked, damaging native species and harming lakes, streams, and rivers.

ANS cause harm to fish populations and other aquatic organisms and can clog up water intake structures and waterways. Hydrilla plants grow thickly in areas to the point that recreation is limited, and bighead and silver carp can displace other species such as paddlefish. Anglers and boaters are vital partners in preventing ANS from spreading.

As soon as you pull your boat out of the water, follow these steps:


Inspect your boat, trailer and equipment for zebra mussels, mud, plant fragments, seeds, and any other organisms from the water. Remove them.


Drain water from your boat, motor, bilge, live wells, bait containers, coolers, and ballast.

Clean or Dry:

Pressure wash the boat, trailer and equipment with hot water (140º F). If pressure wash is not available, allow the boat, trailer and equipment to dry thoroughly for at least five days before visiting a new water body.


Regulations in red are new this year.

Purple text indicates an important note.

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