Kappaphycus alvarezii

Kappaphycus alvarezii is also known as the Elkhorn Sea Moss. It is a red algae or seaweed which is an important commercial source of carrageenans. These are used in food stuffs, anti-aging creams and cosmetics on a regular basis because the polysaccharides they contain readily form gels, add viscosity and have excellent water-holding capacity.

The seaweed is now farmed in mainly tropical sea regions. It supplies a great deal of carrageen. The seaweed is a problematic and noxious weed in Hawaii.