How harvesting of sea weed is done?

It is easier to harvest sea weed from above the low water line and it will be less wet. Limit our impact by picking lightly from some areas. Each patch of seaweed provides food and shelter for various small marine species. Choose no more than a third of the seaweed from any patch and move on to another spot. If you are cutting sea weeds do not take the entire plant but leave a good anchor of at least 20cms to facilitate new development.