Zoobenthos of Lakes
- An extensive and information-packed website about organisms dwelling in or on the sediment in lakes, by S.M. Mandaville of the Soil & Water Conservation Society of Metro Halifax.
- http://lakes.chebucto.org/ZOOBENTH/BENTHOS/i.html

Marine Flatworms of the World
- Devoted to the study of polyclad flatworms (Phylum Platyhelminthes, Class Turbellaria, Order Polycladida), a group of large, free-living marine Platyhelminthes which are mainly found in tropical coral reefs.
- http://www.rzuser.uni-heidelberg.de/~bu6/

SDSU Fish Ecology Lab
- Fish Ecology Laboratory at San Diego State University (USA). Includes research topics, current graduate students and projects the lab is currently involved in that impact San Diego and the nearshore, coastal environment.
- http://www-rohan.sdsu.edu/~kelpbass/

Aquatic Animals
- Articles, links and discussions.
- http://www.suite101.com/articles.cfm/aquatic_animals

Aquatic and Wetland Plants
- A forum for the discussion of current ideas and problems relating to the ecology, conservation, identification and taxonomy of wetland plants.
- http://www.ardeola.demon.co.uk/

FreshwaterLife
- Information about freshwater animals and plants.
- http://www.freshwaterlife.org/

Center for Aquatic and Invasive Plants
- Information, including databases, on aquatic and wetlands plants, including invasive plants and their control. Many internet links to related resources. From University of Florida.
- http://aquat1.ifas.ufl.edu/welcome.html

Marine Life Library
- A searchable compilation of underwater photography featuring marine lifeforms and creatures.
- http://www.marinelifelibrary.org/

Ron's Pond Scum
- Photographs and descriptions of freshwater microorganisms.
- http://www.silkentent.com/gus1911/RonPond.htm