Hello,

This micro-algae might be a Microcystis sp. which is most common bloom forming fresh water micro-algae.

Please find here : http://fmp.conncoll.edu/Silicasecchidisk/LucidKeys3.5/Keys_v3.5/Carolina35_Key/Media/Html/Microcystis_Main.html

More like Chlorella and Chlorococcum.

Likely Chlorella sorokiniana

Sathishkumar R S , Muhamad Maulana Azimatun Nur , Abhishek Mukherjee Thank you for your answers

I agree with people who think they are CHLOROCOCCALES.

I give another possibility: Coenococcus planctonicus.

Maria Verdugo Althöfer - It could very well be, but under this resolution it would be better to stick simply with the specimen being a member of the order Chlorococcales instead of ascertaining the species, in my humble opinion.

Warm Regards

Abhishek Mukherjee yes, i know. I gave ony a posiibility but El Amri Radouane have to do a depper investigation and never ,at first ,believe what is said.

To take it more as a brainstorm .

What it is not is a cyanobacteria

Best regards

Maria Verdugo Althöfer Thank you for your answer

Maria Verdugo Althöfer , true. Appreciate it.

More pictures with better resolution would be necessary. Look also Micractinium, on the first image (x100) some spines are visible.

Best regards

Maria Cellamare thank your for your answer

Chlorella I worked on had a maximum size of about ~10um. Assuming you have magnification 1000X and these lack of flagella, are round cells, I would say chlorella.

Sunil Tiwari thank you for your answer

send the algae samples to the laboratories that can perform algae testing such as taxonomic identification and molecular analysis...

its surely Chlorella sp.

Munay Abdulqadir Alteerah thank you for your answer

@ Sunil Tiwari is right i think