Question

what is blue green algae

Answer 1

blue green algae is another name of cyanobacteria

Answer 2

Hello friend...
Blue green algae is the type of bacteria which also known as Cyanobacteria.
This is called Cyanobacteria because of its colour.
Blue green algae normally looks like green.
Blue green algae normally grows in lake, pond and in warm water.
Blue green algae obtain their energy through photosynthesis.

Hope it helps...