As of December 2021, the collection overall comprises 1440 available live non-axenic strains, split between 1095 cyanobacteria and 345 eukaryotic micro¬algae. Many strains are also cryoconserved. Most strains were isolated from freshwater ecosystems in France and Europe.Recent adds also include strains from hypersaline and extreme environments. Notably, the collection contains multiple strains of various genera of bloom-forming cyanobacteria that are of major ecological concern, some of which produce cyanotoxins.