Back in the late ‘90s, a teacher made a boo-boo. After completing a lesson on crayfish, the teacher dumped them into Pine Lake. Unfortunately, these weren’t ordinary crayfish. Well, not ordinary for this part of the country. And so, the red swamp crayfish started taking over the crayfish niche in the lake, according to Julian Olden, a freshwater ecologist with the University of Washington. Now Olden, with the help of volunteers from around the lake, aims to stop them. Read more about this effort in the Sammamish Review.