Planktothrix agardhii

{{Short description|Species of bacterium}}

{{Speciesbox

| image =

| genus = Planktothrix

| species = agardhii

| authority = (Gomont) Anag. & Komar

}}

Planktothrix agardhii is a species of cyanobacteria belonging to the family Oscillatoriaceae.{{cite web |title=Planktothrix agardhii (Gomont) Anag. & Komar |url=https://www.gbif.org/species/3218385 |website=www.gbif.org |access-date=19 February 2021 |language=en}}

It has cosmopolitan distribution.