How to Identify and Use Seaweed

Many different types of seaweed are found in various marine environments, mainly in the shallow regions close to the shore. These seaweeds are simple plant-like organisms, scientifically called algae. They are fast gaining importance as sources for vitamin C and minerals like calcium and iodine. Observing the fronds of the seaweed is the key to finding out the exact species. This can help in determining if they are edible and the correct way to use them.

Things You'll Need

• Measuring tape
• Magnifying glass

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Instructions

• 1

  Examine the shape of the fronds. Measure their lengths. Check for swellings at the ends of the fronds, which are the reproductive organs of the seaweed. See if there are bubbles filled with air on the frond, or a ridge positioned at the center of the frond. Notice if there's formation of channels on the fronds.

• 2

  Note the exact shade of color that the fronds display. Use this detail to decide which class of algae the seaweed belongs to; the classes are green, red or brown.

• 3

  Use the details you've observed to come to a final conclusion about which species the seaweed belongs to. For instance, if the fronds have a length of about 15 cm and show the presence of channels coupled with swellings shaped like the letter 'v,' it indicates the channeled wrack type of seaweed.

• 4

  Gather seaweed that are freely floating in the water or those that are firmly held on rocks. Avoid seaweed that have been washed onto the shore because they may have undergone decay.

• 5

  Dry the seaweed before use. Choose the method of drying depending on the type of seaweed to be used. Use drying under the sun for delicate types of seaweed. Alternatively, heat the seaweed over a fire till it becomes crisp. Mash the dried seaweed and add it to soups. Soften thicker varieties of seaweed by boiling them for some time. Use this as a substitute for other vegetables.