Which of the following is also known as blue-green algae and is typically found in watery environments?

The Monera also known as blue-green algae and typically found in watery environments are Cyanobacteria.

Cyanobacteria, also known as blue-green algae, are a type of photosynthetic bacteria that are typically found in aquatic environments, such as lakes, ponds, and oceans. They are characterized by their blue-green color and can form large blooms that are visible from space. 

Cyanobacteria are important primary producers in aquatic ecosystems and play a crucial role in the global carbon cycle. They are also capable of nitrogen fixation, which is the conversion of atmospheric nitrogen gas into a usable form for plants and other organisms. Archaebacteria and Eubacteria are two other types of Monera, but they are not specifically related to cyanobacteria. Slime molds are eukaryotes