This edition contains primary articles, i.e. Synthesis of Polyvinyl Aclohol-Chitosan Hydrogel and Study of Its Swelling and Antibaterial Properties; Identification and Partial Characterization of Crude Extracellular Enzymes from Bacteria Isolated from Shrimp Waste Processing; Bacterial Diversity of the deep sea of sangihe Talaud, Sulawesi; and review articles, i.e The Potential of Heterotropic Microalgae (Schizochytrium sp.) As a Source of DHA; and Application of Modified Athmosphere {acking (MAP) on Fresh Fish.