Ron's Pond Scum - Photographs and descriptions of freshwater microorganisms. Marine Life Library - A searchable compilation of underwater photography featuring marine lifeforms and creatures. FreshwaterLife - Information about freshwater animals and plants. 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. 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. 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 and Water Conservation Society of Metro Halifax.