Acadian Seaplants is a diversified, technology-based manufacturer of natural, specialty fertilizers, feed, food, food ingredients and brewery supplies derived from select species of marine plants. Link.
Koeltz Scientific Books has the largest holdings of seaweed and algal books in the world. Search their on-line database.
Irish Seaweeds Ltd. Suppliers of 100% natural hand-harvested seaweeds and edible sea vegetable products from Ireland. Link.