What is cyamobacteria?

Answer 1

a type of bacteria

you probably mean "cyanobacteria" which are blue bacteria

Answer 2

Cyanobacteria, also known as blue-green algae, are a type of bacteria that can photosynthesize like plants. They are commonly found in freshwater and marine environments, and some species can produce toxins that can be harmful to humans and aquatic life. Cyanobacteria play an important role in the ecosystem by producing oxygen and fixing nitrogen.