Algae are photosynthetic, like plants, but because they lack the many distinct organs such as leaves or roots they are not considered as plants.

 

 

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Algal growth is high in nutrient rich, shallow coastal waters and as more light penetrates the water’s surface as more the algae flourish.

 

The first layer of fouling is “slime” – billions of single- or multi-cellular  algae that form colonies on the hull. It doesn’t wash off when the boat moves through the water, it needs to be cleaned off.