Marine Plankton (Systematics and Faunistics) . [Studies of the fauna of the seas] . Issue. 20 (28)], created by the team of authors, is a unique and in-depth study of one of the most mysterious and important components of the marine ecosystem - plankton. This scientific work is intended for specialists, researchers and students interested in marine biology, as well as for anyone interested in the mysteries of the ocean depths and the biological diversity of marine organisms. The book focuses on the systematics and fauna of marine plankton, its role in maintaining the balance of marine ecosystems, as well as methods of research and classification of these microscopic, but extremely important creatures. The authors analyze in detail the diversity of species, their morphological features, features of the life cycle and environmental functions. The book reveals the subtleties of identifying different groups of plankton - phytoplankton and zooplankton, as well as their interaction with the environment and the impact on global processes, such as climate change and biogeochemical cycles. This publication is the result of many years of research and field expeditions, it is filled with fresh data, new discoveries and analytical reviews. The reader will be able to plunge into the fascinating world of microscopic organisms, to understand how these tiny creatures form the basis of the marine food chain and how their diversity affects the state of the oceans as a whole. Particular attention is paid to modern methods of studying plankton, including molecular technologies, which makes the book relevant for those engaged in bioinformatics and genetic research. The book "Marine Plankton (Systematics and Faunistics)" is perfect not only for specialists - marine biologists, ecologists, zoologists and students of specialized universities - but also for curious naturalists interested in marine nature and its mysteries. Its content will be interesting for both young researchers and experienced scientists, because it contains not only scientific data, but also analytical reviews illustrating the dynamics of changes in the marine fauna. The peculiarity of this publication is its systematic approach to the classification and description of species, which helps to understand the complex relationships within marine ecosystems. The authors use a rich scientific language, but at the same time make the material available to a wide audience interested in biological research. The book discusses in detail the adaptation of marine plankton to different conditions, its role in global biological processes, as well as the influence of anthropogenic factors on its number and diversity. If you are looking for a book that will not only expand your knowledge of marine fauna, but also inspire new research, “Marine Plankton (Systematics and Faunistics)” will be an excellent choice. This publication is not just a collection of scientific data, but a real guide to the microcosm of the ocean, revealing its secrets and emphasizing the importance of preserving marine ecosystems. The style of the authors is distinguished by accuracy, analytical depth and love for marine nature, which makes reading not only informative, but also fascinating. This book is a part of the series “Studies of the fauna of the seas”, and its issue number 20 (28) testifies to its scientific value and relevance. It will be a valuable addition to any scientific library, training course or research project, helping to understand how microscopic organisms form the basis of life in the ocean and why their preservation is so important for the future of the planet. As a result, the “Sea Plankton” is not just a scientific publication, but a key to understanding the complex processes occurring in the depths of the sea, and the importance of studying them for all mankind.