Marine Biology Explorations http://life.bio.sunysb.edu/marinebio/explorations.html       A site developed at State University of New York at Stony Brook. Miscellaneous information about various marine organisms, grouped by the habitat in which the particular organisms are found. Categories especially worth consulting: Plankton, Hot Vents, Larvae, Antarctic. This site also has a nice presentation on the Challenger Expedition, the world's first major oceanographic expedition.         Journey into Phylogenetic Systematics http://www.ucmp.berkeley.edu/clad/clad4.html       This is part of the University of California's Museum of Paleontology's online exhibits. Very clear introduction to cladistics, and how this approach is used to determine evolutionary relationships among different groups of organisms.         The Tree of Life http://phylogeny.arizona.edu/tree/phylogeny.html       This site developed at the University of Arizona provides information about phylogenetic relationships and morphological characteristics of organisms, illustrating the diversity and unity of life. Includes links to other sources of information available on the Internet.         Society for Integrative and Comparative Biology http://www.sicb.org       Check out the Invertebrate Zoology home page for links to some interesting sites, courtesy of the Society for Integrative and Comparative Biology. Some of the other society divisions also contain links to marine sites.         Sherman's Lagoon http://www.slagoon.com       Comic strip, drawn in Hawaii, featuring Sherman (a shark), Hawthorne (a hermit crab who lives in a beer can), Fillmore (a sea turtle), and a variety of other interesting marine creatures. Click on "Meet the Lagoonies" first to learn about the various characters, and then click on "Daily Cartoon" to see what they're up to.         Information about Local High and Low Tides http://tbone.biol.sc.edu       (you can also access this site from www.bostonglobe.com. Through the sports/outdoors icon, and then via "fishing.")