Seaweed can be used as food, and is popular as a snack or light meal in some countries, inlcuding China, Japan and Wales. The Chinese serve shredded and dried seaweed in bowls, whilst the Welsh make lavabread croquettes by mixing it with flour and onions. Seaweed can also be used to make fertiliser, both in dried and in liquid form, for use in agriculture and by private gardeners. It can also be used as animal feed, being extremely high in minerals.
To make seaweed in alxemy is DNA + Sunlight. And there's your seaweed.
Detailed list: http://en.wikipedia.org/wiki/Seaweed#Uses
air+seaweed=fern
Seaweed is used as food for animals and humans. (suprisingly!)
Fish eat seaweed. Dolphins eat fish. No seaweed, no fish, no dolphins.
Seaweed is used in shampoo and toothpaste as well as other products.
yes it is blue smarties use seaweed now
seaweed is a plant used for salad and khao meri lindi
Agar is a seaweed extract. It is used in food.
An agarose is a polymeric cross-linked polysaccharide extracted from the seaweed agar and used to make gels.
you get seaweed in Alxemy with sunlight and DNA
Carrageenan is derived from red seaweed. It is used as a thickener in cooking.