Spring semesters are when we teach Intro to Animal Behavior and the lab that goes along with it. We have had our interesting times in the past with crayfish husbandry, but this time we finally have the new aquarium system working in our favor thanks to an enormous amount of effort from Pablo (super TA) and Adam (awesome undergrad). Once we get the old paddlefish tanks in the basement working well again, and a little aquaponics setup in place for lettuce for crayfish snacks, our system will be complete. The crayfish are used in a set of experiments on dominance and conflict, which is pretty much the classic use of crayfish in undergrad animal behavior labs. Plus the students really enjoy it.