Your help to report new sightings and to prevent their spread is vital. Early detection of isolated populations may help prevent their spread. If you discover a rusty crayfish, freeze it in a sealed plastic bag, note the date and location, and call the Emporia Research Office at (620) 342-0658 or email the Aquatic Nuisance Species Coordinator. What do I do if I discover a rusty crayfish? Never dump live crayfish from one waterbody into another.Never dip your bait bucket into a lake or river if it has water in it from another waterbody. ![]() Always dispose of your unwanted bait on land or in the trash.Always drain water from your boat, livewell, and bilge before leaving any water access.Due to these hostile habits, the rusty crayfish. They are known to be very territorial, fighting off any other species that intrude on their newly claimed home. It could be because of these chela, but the rusty crayfish are also extremely aggressive. Females carry fertilized eggs which make spread easier. This species can thrive in areas of high flow or in standing water, but unlike other species of crayfish that can burrow in the sediment when water conditions. The chela (key-la) is the name for the pair of pincer-like claws that crabs and crayfish have.They destroy plant bed abundance and diversity.Has larger, more robust claws than native crayfish. Spot size and darkness is highly variable across individuals. Rusty Crayfish Rusty crayfish have dark rusty-colored spots on each side of their back, about where you would grab them to pick them up. Rusty crayfish displace native crayfish. Rusty crayfish (Orconectes rusticus (syn.Rusty crayfish have large, black-tipped claws.The rusty crayfish has not been found in Kansas.If you find a rusty crayfish, or catch one in a trap, take a photo of it and either return it to the water or kill it. In recent years its distribution has expanded because of the use of live crayfish as bait by anglers. Rusty crayfish are 3-5 inches long, with a grayish-green body and easily-identifiable reddish fingerprint-like spots on each side of the body just in front of the tail.There are historical reports of Digger crayfish (Fallicambarus fodiens) being found in Wisconsin. They are associated with population declines of game fish such as bluegill, bass, and northern pike. These three species typically comprise more than 90 of specimens in crayfish collections. Rusty crayfish outcompete native crayfish for food and territory and reduce aquatic plant abundance and species diversity, which impacts the habitat for other crayfish and fish species. The normal distribution of the rusty crayfish includes Illinois, Indiana, and Ohio. Virile crayfish, the Northern Clearwater crayfish, and the Rusty crayfish.
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