See also:

• Science: Biology: Botany: Phycology  (12)
• Science: Biology: Genetics: Eukaryotic: Protists  (3)
• Science: Biology: Microbiology: Protistology  (16)
• Science: Earth Sciences: Paleontology: Micropaleontology  (32)

• Acritarchs and Chitinozoa - Information on these organisms which have not yet been able to be classified, including their fossil record, biology and life cycle with a number of images of individual species.
• Algae - A basic guide to algae including marine, freshwater and land species.
• Algae Description and Types - Algae are plant-like organisms that are usually photosynthetic and aquatic and this article describes the main phylogenetic groups.
• Algae from Bemersyde 2006 - Biologists have been studying a loch on the Scottish Borders over time and provide a list of the algae and other protists found in it, with photographs of each.
• AlgaeBase - Information on the algae of the world, including terrestrial, marine, and freshwater forms. Search by genus, species, or common name. Includes images and references.
• AlgaeVision - Provides a searchable image database for UK freshwater and terrestrial algae.
• Caribbean Reef Plants - Sample pages and images from an identification guide to marine algae and seagrasses.
• The Center for Phycological Documentation - Information about algae and their taxonomy, including 'The Catalogue of the Benthic Marine Algae of the Indian Ocean,' and 'The Index Nominum Algarum,' a compendium of circa 200,000 algal names.
• Droplet - Microscopy of the protozoa by Piotr Rotkiewicz - includes images, systematics, glossary, forum, and resources.
• Flagellate - Information from Wikipedia on these unicellular organisms with one or more whip-like organelles called flagella. Although sharing this common structure, they are not a single taxonomic group.
• Flagellated Protozoa - Article by Wim van Egmond introducing these organisms with photographs of Euglena, Peranema, Dinoflagellates and Spongomonas, and instructions on growing your own cultures.
• Freakin Fucus - Introduction and technical information regarding seaweeds and phycology.
• Freshwater Algae - Provides information on the varieties of algae and their classification with photomicrographs of example species of the main freshwater phyla.
• Freshwater Diatoms and Algae - Microscope images of many genera, mostly collected in central Texas.
• Introduction to the Chromista: From Microbes to Giants - General discussion of the kingdom-level taxon Chromista, including diatoms, kelp, downy mildew, and other organisms that possess chlorophyll and are mostly photosynthetic, but are not plants. Includes links for more information.
• Introduction to the Sagenista - Information on the bicoecids and slime nets which form a basal group of chromists, the classification of which is unclear.
• Just what is this Stuff we call Algae? - Information on the freshwater algae likely to be found in a garden pond.
• Kingdom Protoctista - Introductory look at the Kingdom.
• Marine Algae of Northern California - About 16 photographs of species found in this region.
• Marine Collection - Small photograph gallery of microscopic algae, phytoplankton and diatoms.
• Marine Protozoa - Article by Jean-Marie Cavanihac on these organisms with photographs of many species.
• Natural Perspective: The Protoctist Kingdom (Protoctista) - Describes the kingdom as "a catch-all for the multicellular organisms which don't fit into the Animal, Plant, or Fungus Kingdoms" and describes its scope.
• Parasitic Protozoa - About 10,000 species of Protozoa are parasitic and this article provides information on these species and the illnesses they cause.
• Photographs of Algae - Images of about 20 species from the El Eden Ecological Reserve, Mexico.
• Protist - Information from Wikipedia on this group of organisms which cannot be classified as plants, animals or fungi.
• Protist Image Data - Pictures and information on selected genera of algae and protozoa.
• Protist Images: Heterokonta - Classification of these flagellates with a number of images of individual species. English and Japanese.
• Protist Information Server - Image database archiving more than 34,000 images (511 genera, 1944 species) and 556 movie clips for research and education.
• Protistan Phyla - Short articles and illustrations of the major groups of protists.
• Protozoa - Exercise from Invertebrate Anatomy OnLine covering Euglena, Trypanosoma, Trichonympha, Peridinium, Paramecium and other ciliates, Monocystis lumbrici, Opalina, Amoeba, Arcella, Difflugia, Globigerina, Radiolaria and Actinosphaerium in detail.
• Protozoa - Article from Wikipedia on the unicellular microbes that are traditionally classified as protozoans, based on their methods of locomotion.
• Seaweed Site - Information on many aspects of seaweeds with links to other sites connected with these algae.
• UTEX: The Culture Collection of Algae - This collection includes approximately 3,000 different species of living algae, representing most major algal taxa, many of which can be supplied in large volumes.