- NASA Oceanography Program
- NASA SeaWiFS Project
- Provasoli-Guillard National Center for the Culture of Marine Phytoplankton
- For Kids Only: What are phytoplankton?
- NASA Earth Observatory: What are phytoplankton?
- Checklist of phytoplankton in the Skagerrak-Kattegat (N. Atlantic Ocean)
- Phytoplankton are your friends
- Sea Soup Teacher's Guide: Discovering the Watery World of Phytoplankton and Zooplankton
- Creating plankton (Gulf of Maine Aquarium)
- Plankton "ID" activity (Bigelow Laboratory)
- Biodiversity and Biological Collections Web Server
- Biological diversity: Classification (Estrella Mountain Community College)
- Biological classification (from Evolutionary Biology course, Univ. of Buffalo)
- Bioluminescence (Scripps Institute of Oceanography)
- The Bioluminescence Web Page (Univ. of California at Santa Barbara)
- Luxgene: A collection of glow-in-the-dark lifeforms
