Large image gallery of freshwater algae from the Keweenaw Peninsula, Michigan.

Information on the algae of the world, including terrestrial, marine, and freshwater forms. Search by genus, species, or common name. Includes images and references.

Sample pages and images from an identification guide to marine algae and seagrasses.

Microscopy of the protozoa by Piotr Rotkiewicz - includes images, systematics, glossary, forum, and resources.

Introduction and technical information regarding seaweeds and phycology.

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.

Brief introduction, from courseware for Introductory Biology courses at the University of Southern Mississippi.

An interactive phylogenetic tree with information about the major groups of protists.

Introductory look at the Kingdom.

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.

Overview of the one-fifth of protozoan species that are parasitic.

Images of about 20 genera from the El Eden Ecological Reserve, Mexico.

Pictures and information on selected genera of algae and protozoa.

Image database archiving more than 34,000 images (511 genera, 1944 species) and 556 movie clips for research and education.

Short articles and illustrations of the major groups of protists.

Algae-L discussion list, book list, comprehensive information, and photographs.

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.

Basic information and links to resources about algae.