Aquatic ecosystems are primarily divided into two types - marine and fresh water ecosystems; based on the percentage of dissolved components. This book complies researches from across the globe to provide a comprehensive overview of aquatic ecosystems. Some of the diverse topics covered in this text are predation behavior, solar salt production, crude oil biodegradation, etc. The aim of this book is to bring forth new horizons of research and aid students in better understanding the concepts of this field.