Marine bacterial biofilms encapsulated within extracellular polymeric substances (EPS) play multifaceted roles in fostering ecological resilience and driving economic activities. In mangrove/ marine ecosystems, bacterial biofilm and EPS are instrumental in promoting plant growth and enhancing soil health. Through symbiotic interactions with mangrove roots, these bacteria facilitate nutrient cycling, soil aggregation, and plant growth promotion. Moreover, bacterial biofilm and EPS contribute to the bioremediation of organic and inorganic pollutants by enzymatic degradation and sorption mechanisms. EPS from marine bacteria offers diverse array of benefits, encompassing the augmentation of ecosystem resilience and the facilitation of innovations in biotechnological applications and environmental remediation. Exploitation of their versatile properties will pave the way for a more sustainable and prosperous future in the blue economy landscape. Keywords: Marine bacteria, Biofilm, Extracellular polymeric substances, Plant growth promotion, Bioremediation, Hydrogels