Green seaweeds have been repeatedly used as a natural material to extract bioactive compounds because of their widespread distribution and large biomass. They are usually grown or collected for food consumption and especially known for their high nutritional value and health benefits. Marine green algae remain largely unexploited among the three divisions of macroalgae (i.e., Chlorophyta, Phaeophyta and Rhodophyta). Interest in utilizing seaweeds as natural resources has recently increased because of their many active ingredients, particularly those that may be used for medical purposes. Seaweeds are also considered as a source of bioactive compounds as they are able to produce a great variety of secondary metabolites. They are characterized by a broad spectrum of biological activities with antiviral, antibacterial and antifungal activities which acts as potential bioactive compounds of interest for pharmaceutical applications. Polysaccharides have the potential to be used as drugs and drug intermediates. They can be used as bio-absorbers, nutrient resources, for protection of cellular material, cold agent, lowering blood pressure and as an anti- oxidant. Polysaccharides are thus significant in the field of medicine, food and health care. Sulfated polysaccharides (SP) from different sources have been studied in the light of their important pharmacological activities, such as anticoagulant, antioxidant, antiproliferative, antitumoral, anticomplementary, anti-inflammatory and antiviral properties. The present study is aimed at extracting and comparing the Polysaccharides from Chaetomorpha antennina and Ceratophyllum submersum.
