FreshwaterLife - Information about freshwater animals and plants. Life in a Massachusetts Tide Pool - Articles, photographs and activities involving a variety of marine organisms. Marine Biology - Site with descriptions and pictures of over 60 of the intertidal organisms in the Pacific Northwest. Marine Biology with Ms. M. - Information on taxonomy of sharks. Library - A searchable compilation of underwater photography featuring marine lifeforms and creatures.
Site discusses their potential uses in biology education and research on evolution and ecology.
Ron's Pond Scum - Photographs and descriptions of freshwater microorganisms.