Red Tide and Harmful Algal Blooms
- Introduces kids to algal blooms, a case where algae is environmentally hazardous.
- http://www.whoi.edu/redtide/

Marine Plants & Algae
- Brief introduction to algae and other marine plants, with more information on subspecies such as the green algae, sargassum, and brown algae.
- http://mbgnet.mobot.org/salt/oceans/forest.htm