There are many types of seaweed that can be used in laver. Typically however a Porphyra is used (we have 7 varieties here in the UK). These would normally be flat sheets of brown or red seaweed.
Kathleen Mary Drew-Baker discovered vital information which revolutionised the laver industry, which today is the richest form of aquaculture in the world.
The story and history of laver and seaweed use as food sources in Wales.
One of the food wonders of the world