Seaweeds are macrophytic algae, ubiquitously distributed along coasts from tropical to Polar Regions. They lack true roots, stem, leaves and generally grow in intertidal and sub-tidal regions of the sea. They belong to the Plantae kingdom, and being photosynthetic, constitute the basis of the food chain in aquatic ecosystems. Seaweeds are further classified as brown algae (Ochrophyta-Phaeophyceae), red algae (Rhodophyta) and green algae (Chlorophyta). Red seaweeds like Gelidium Gracilaria and Pterocladis are important for human consumption and are also used as a binder and gelling agents in food products. Eucheuma and Kappaphycus are used in manufacturing of carrageenan and in cosmetics, food processing and have a few industrial applications too.