The culture of seaweed is a growing worldwide industry,producing 14.5 million tonnes (wet weight) worth US$7.54 billion in 2007 (FAO,2009). The use of aquatic macrophytes in treating sewage effluents has also shown potential. In recent years,macroalgae have been increasingly used as animal fodder supplemants and for the production of alginate,which is used as a binder in feeds for farm animals, Laboratory investigations have also been carried out to evaluate both algae and macroalgae as possible alternative protein sources for farmed fish because of their high protein content and productivity.