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Scientific classification
Kingdom: Bacteria
Division: Cyanobacteria
Class: see [1]
Order: Nostocales
Family: Nostocaceae
Genus: Nodularia
Mertens 1822

Nodularia armorica
Nodularia harveyana
Nodularia sphaerocarpa
Nodularia spumigena

Nodularia is a genus of filamentous cyanobacteria, or blue-green algae. They occur mainly in brackish or slightly salinic waters, e.g. in the Baltic Sea. Nodularia cells occasionally form heavy algal blooms. Some strains produce a toxin called Nodularin R, which is harmful to humans.


  1. Jiří Komárek, Tomáš Hauer. "Cyano Database - DB of genera - Nodularia". The on-line database of cyanobacterial genera. Retrieved August 11. Unknown parameter |accessyear= ignored (|access-date= suggested) (help); Check date values in: |accessdate= (help)