Can anyone help identify these plankton specimens ?

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Frédéric Azémar

A5 is a nauplius larvae of a cyclopid copepod.

A4 and A6 are not organisms. They are pieces of detritus.

A2 is a filamentous algae.

Maria Verdugo Althöfer

Hi!

i am agree with the answer of F. Azémar

A2 looks like a Cyanobacteria with sheaths , oscillatoriales (Phormidiaceae) perhaps Phormidium.

Süsswasserflora von Mitteleuropa / Ettl, H. ; Gerloff, J. ; Heynig, H. ; Pascher, A.

Title Bd. 19/2: Cyanoprokaryota: teil 2: Oscillatoriales

Author(s) Komárek, J. ; Anagnostidis, K.

Maria Van Herk

A2: Definitely not Cyanobacteria, I can see chloroplasts, so it has to be something else.

A4: detritus

A5: not phytoplankton, so I have no idea

A6: detritus

Acosta F

A5: nauplius of cyclopoida (copepod)

A2: filamentous algae (Clorophyta; Ulothrix??)

A4 A6: detritus