Welcome to the wonderful world of algae!

(Macroalgae = seaweed / Microalgae = microscopic algae)

The biodiversity of microalgae is enormous and they represent an almost untapped resource. It has been estimated that about 200,000-800,000 species in many different genera exist of which about 50,000 species are described. Over 15,000 novel compounds originating from algal biomass have been chemically determined. Examples include carotenoids, antioxidants, fatty acids, enzymes, polymers, peptides and other fine chemicals. [1]

Microalgae can also be used for wastewater treatment and control of CO2 emissions.

Algal Biofuel – Fuel of the Future [2]

Microalgae can produce far more biomass than any high-yielding plant crop. Estimates by The World Bank indicate that a seaweed aquaculture area of 5 million km2 (0.3% of the ocean surface) could produce as much biomass annually as all of the global agriculture. [3]

Ref/Link/Source
[1]https://en.wikipedia.org/wiki/Microalgae
[2]KONERU VAMSI KRISHNA algaefuel-150910070818-lva1-app6892.pdf
[3]Bjerregaard et al. (2016) Seaweed aquaculture for food security, income generation and environmental health in tropical developing countries (No. 107147, pp. 1–16). The World Bank.