Here are some USGS Web pages with more information on plankton and Anywhere:
Coastal Louisiana
Chapter from Status and Trends of the Nations Biological Resources on the marshes, forested wetlands, barrier islands, and marine ecosystems of the coast of Louisiana with descriptions ths status of wildlife and fishery resources.
(Score: 0.690)
Marine resources
Detailed report with photos, graphs, and charts on marine resources of five large marine regions of the U.S. covering environment and physical features, and planktonic, benthic, fishery, amphibian, bird, and mammal resources.
(Score: 0.690)
Definition:
Collection of small or microscopic organisms, including algae and protozoans, that float or drift in great numbers in fresh or salt water, especially at or near the surface, and serve as food for fish and other larger organisms. [American Heritage Dic. of the English Language, 4th ed.]