Hello and thank you for your report! I agree this looks like a Red Swamp Crayfish. I will notify some of our aquatic invertebrate reviewers to see if they have any follow-up for you. In the meantime be sure not to move live crayfish from one waterbody to another, and keep an eye out for others - this could be a one-off lost bait, but we definitely would like to know if they keep showing up.

Here is a great resource from Oregon SeaGrant that describes Oregon's non-native crayfish, http://seagrant.oregonstate.edu/sites/seagrant.oregonstate.edu/files/invasive-species/toolkit/crayfish.pdf

Thanks again,
Lindsey

Lindsey Wise
Oct. 3, 2017, 7:45 a.m.