Seaweeds on the web
www.algaebase.org the most authoritative, comprehensive, and up-to-date online database on terrestial and marine algae as well as sea grasses from more than 200 countries. The data base contains information on more than 130.000 species, presented along with illustrations and photos as well as geographical distribution and references to the international literature.
www.isaseaweed.org homepage for The International Seaweed Organization that represents interests in research and industrial applications of algae.
www.seaweed.ie a very extensive homepage with general information on algae, aquaculture, and uses of algae as food and medicine. The page has an impressive collection of images of seaweeds.