The study of the ocean and its biological and physical aspects is known as oceanography. It is an earth science that includes a wide range of topics such as ocean current, ecosystem, and geophysical fluid dynamics. It also encompasses the study of plate tectonics as well as the geology of the sea floor. It examines different physical properties and chemical substances found in the ocean and across its boundaries. It blends the understanding of the processes within a number of disciplines like biology, chemistry, climatology, geology, geography, hydrology, physics and astronomy in order to acquire an in-depth knowledge of the oceans. Biological oceanography and chemical oceanography are two primary branches of oceanography. Biological oceanography includes the ecology of marine organisms. The study is done on the basis of the ecological characteristics of an individual organism and the physical, chemical and geological aspects of its ocean environment. The chemistry of the ocean is studied under chemical oceanography. It is concerned with the understanding of seawater properties. This book covers in detail some existent theories and innovative concepts revolving around biological and chemical oceanography. It includes contributions made by international experts. It is meant for students who are looking for an elaborate reference text on these disciplines.