The marine environment has always been beneficial to mankind in one way or another. With advancements in scientific knowledge and technological development, novel aspects of marine resources have been and are being revealed that can be harnessed for sustainable development of blue economy. The book Marine Biotechnology: A Gateway to Blue Economy is an attempt to present before the scientific community, a compilation of recent developments in the field of marine biotechnology contributed by leading scientists of international repute. The book covers diverse roles of marine biotechnology, including in agriculture, probiotics, health sector, novel biomolecules, biochemicals, biomedicine, and pharmaceuticals.