Some of the commercially important marine shrimps are Tiger Prawn (Penaeus monodon), Indian White Prawn (Penaeus indicus), Pink Shrimp (Metapenaeus dobsoni), Brown Shrimp (Metapenaeus monoceros), etc. For Aquaculture purpose, the exotic Pacific White Shrimp (Litopenaeus vannamei) has been introduced into India and is being farmed extensively on a commercial-scale in low-saline or brackishwater ponds in Gujarat, Karnataka, Kerala, Tamil Nadu, Andhra Pradesh, Odisha, West Bengal etc. With the availability of Specific Pathogen Free (SPF) quality brooders and seed and adoption of improved culture techniques, mortality of juvenile and young shrimp due to disease reduced and thereby yields of shrimp increased significantly in the country