Algae and seaweed
Algae and seaweeds are the most important plant groups in the sea. The groups consist of a large number of species with diverse and sometimes extremely complex reproduction strategies. Although the entire group falls under the algae, according to the biological classification, many people think of one-celled plants when they hear the term algae. Seaweeds are the multi-celled species.
Source: de Vleet, Ecomare
