This book investigates the complex and often mysterious life cycle and biology of eels. It draws upon the extensive research and expertise of K. Tsukamoto, a leading figure in eel research, to present a comprehensive overview of these fascinating creatures. The work likely synthesizes current scientific understanding of eel migration, reproduction, physiology, and ecological roles, providing detailed insights into their unique adaptations and behaviors.

This book is likely regarded as a significant contribution to the field of ichthyology, offering a specialized and detailed account of eel biology. Its focus on scientific research suggests it is aimed at students, researchers, and marine biology enthusiasts seeking authoritative information. The depth of coverage, attributed to an expert like K. Tsukamoto, implies a comprehensive and scientifically rigorous treatment of the subject matter.