Oceanography is the study of oceans, their physical and chemical properties. It is a branch of Earth science. It delves into the varied aspects of oceans such as ocean currents, waves dynamics, geology of the sea floor among many others. It combines the principles of biology, hydrology, physics, climatology, chemistry, etc. to better understand the process of ocean ecosystems. The geological past of the oceans is studied under the domain of paleoceanography. This book presents detailed analysis of all crucial concepts and theories related to the advances made in this field of study. From theories to research to practical applications, chapters related to all contemporary topics of relevance to this field have been included in this book. It will serve as an ideal reference text for students, academicians and professionals associated with the field of oceanography at various levels.