This is a 32 slide PowerPoint over crustaceans. The first 3 slides describe the characteristics of crustaceans. The next 8 slides list and have photos to show 8 different types of crustaceans: crabs, lobsters, shrimp, barnacles, prawns, water fleas, pill bugs, and crayfish. Slides 13 – 16 present more specific information about crayfish. The last 14 slides help students label the external anatomy of crayfish. In my class, we follow up with the dissection of a crayfish. You may also be interested in purchasing a note taking guide that students may fill out while viewing the PowerPoint.