This book highlights a comprehensive analysis of marine flora-derived nanoparticles (MFNPs), encompassing synthesis, characterization, physiological properties, and regulatory factors. It delves into the benefits of conjugation, mechanisms of action, and limitations, highlighting the challenges and opportunities in the field. The book identifies research gaps and outlines future directions, providing valuable insights for researchers and professionals working with MFNPs. The book covers a range of marine flora, including seaweeds, seagrasses, mangroves, and other coastal plants. By shedding light on the potential applications of MFNPs, this book serves as a valuable resource for those in the field. It fosters further research and innovation, ultimately contributing to the advancement of MFNP-based technologies and their applications in various industries.