A thermoplastic material composition containing certain biodegradable and renewable components is described. The thermoplastic composition that includes a least one kind of algae or a blend of at least one kind of algae and a plant polymer a blend of algae and/or plant-based polymers, such as proteins and starches, as relatively low cost feedstock. The algae or blend may be plasticized. Additionally, a method adapted for large scale fabrication of fibers, films, or extruded articles is also described.