AlgaeVision: Virtual Collection of UK Freshwater Algae and Habitats: http://www.nhm.ac.uk/research-curation/projects/algaevision
A searchable database of photographs of freshwater algae. The photographs are presented at several sizes, keep clicking!
||All major groups of terrestrial, fresh- and slightly brackish water algae are included, except: diatoms, colourless forms (except Dinoflagellates) and symbiotic algae (eg in lichens). Marine cyanobacteria ARE included.