Ocean optics is the study of the transmission of light through the ocean and interaction of light with other bodies in water. The sun rays that fall on the ocean water interact with the different dissolved and particulate constituents of the seawater. This interaction is studied using the methods of ocean optics. The information about the interaction of light in water is important for understanding the underwater ecosystems and their functioning. Ocean optics is a branch of oceanography that is engaged in the research on a wide range of issues related with engineering and ocean science. In-situ study of ocean optics is facilitated by using satellite data. This book elucidates the various methods and applications of ocean optics in a multidisciplinary manner. It will also provide interesting topics for research, which interested readers can take up. This book is a resource guide for experts as well as students.