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Algae ID guides
Major freshwater algal groups
(PDF 173 KB)
Cyanobacteria (blue-green algae)
(PDF 379 KB)
Desmids (422.7 KB)
Filamentous algae (377.65 KB)
Red algae (958.35 KB)
Diatom (1.34 MB)
Algae under a microscope. [NIWA]