This book is the only manual of its kind with exercises that apply to the diverse marine habitats of North America. The manual meets the needs of any introductory marine biology student, from the non-major to the prospective major with a background in the biological sciences. Each unit includes a broad range of exercises, so that instructors using the manual can select the exercises that best match the needs of their introductory course. The manual is also unique in providing extensively illustrated identification keys for three of the major marine lifeforms, allowing students to identify and classify organisms within the invertebrates, plankton, and fishes.