Appropriate for undergraduate and graduate students in marine biology and ecology, Marine Biology emphasizes the ecological principles governing marine life throughout all environments within the world's oceans. This unique ecological approach adds real-world relevance by exploring how organisms interact within their individual ecosystems. The text is organized by habitat, each receiving detailed, in-depth coverage which gives instructors flexibility to focus on their particular areas of interest. The fourth edition is fully updated to include the latest research and new data on topics, such as global warming. In addition to Nybakken's engaging writing style, the text offers additional questions, full-color plates, and an enhanced art program that makes it accessible, as well as an excellent reference for future study.