Cyanobacteria (Blue-Green Algae): Spirulina is a multicellular, filamentous cyanobacterium widely recognized as a "superfood" due to its exceptional nutritional profile.

Nutritional Content: It is an extremely rich source of high-quality proteins (comprising 55–77% of its dry weight), vitamins (especially B-complex), minerals (like iron and manganese), and essential fatty acids.

Commercial Marketing: Because it is non-toxic and easily digestible, it is cultivated globally and marketed as a dietary supplement for humans and animal feed in aquaculture and poultry industries.

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