It is a bacterium.
Blue-green algae or cyanobacteria exhibits prokaryotic nature, which causes them to be classified with bacteria in the prokaryotic kingdom Monera.
Also see:
- Blue green algae
- Why Are Cyanobacteria Called Blue-green Algae?
- Differentiate Between Bacteria And Cyanobacteria.
- Is Spirulina A Bacteria Or Algae?
- Why are blue-green algae bad for you?
