Blue Frontier Campaign - Use the marine grassroots directory to find local ocean protection organizations, and get involved in the "Blue Movement."
Coral Reef Alliance - Information on coral reefs and how to keep them healthy. Includes a coral reef photo gallery.
Conservation International's Marine Portal - Access news, publications and web resources related to the marine environment.
The Cousteau Society - Join the Cousteau team on their worldwide expeditions as they explore the fragile web of life beneath the sea.
EPA's Oceans Page - Whether your ocean knowledge is fundamental or extensive, this site has plenty of useful information for you.
European Project on Ocean Acidification (EPOCA) - The EPOCA consortium brings together more than 100 researchers from 27 institutes and 9 European countries with the aim of advancing our understanding of the biological, ecological, biogeochemical, and societal implications of ocean acidification.
FishBase - A database containing photos and descriptions of almost every fish species known to science.
Heal the Bay - A non-profit group using research, education, community action and policy programs to make Santa Monica Bay and Southern California coastal waters safe and healthy for people and marine life.
Marine Biology: The Living Oceans - At this kids' website from the American Museum of Natural History, ocean scientists use fun activities and games to explain basic concepts of life beneath the waves.
Marine Mammal Center - Learn about marine mammals and what to do if you find one stranded on the beach.
Monterey Bay Aquarium - This family-friendly site includes activities for kids, a field guide to sea creatures and wallet-sized Seafood Watch cards to help you make smart choices when you see fish on the menu.
National Coalition for Marine Conservation - News, information and action items relating to the conservation of sharks, swordfish, billfish and other ocean fish.
National Oceanic and Atmospheric Administration - Features of the government agency's site include a State of the Coast Report, an interactive MapFinder service, tide predictions and even a special El Niño section.
The Ocean Conservancy - From citizen action to hands-on conservation work, this site shows you how to dive right in to help keep our oceans healthy.
Oceana - Learn about the environmental threats oceans face, the legal battles to protect them and actions you can take online.
OceanExpert - OceanExpert, also known as the Global Directory of Marine and Freshwater Professionals, is a database containing information on thousands of individuals involved in marine or freshwater research and management.
Pew Oceans Commission - An organization established to assess the condition of America's oceans and living marine resources, and set national priorities to restore and protect them for future generations.
Sea & Sky - This site takes you from the depths of our planet's oceans to the heights of our solar system.
Sea Around Us - This partnership between the University of British Columbia Fisheries Centre and the Pew Charitable Trust focuses on researching the impacts of large-scale fisheries on marine ecosystems, and how these trends can be reversed. The site presents technical information, maps and databases.
SeaWeb - A multimedia public education project of the Pew Charitable Trust, this website provides a wide spectrum of information and opinion on the ocean world and all life connected to it.
Secrets of the Ocean Realm - This PBS site brings you face to face with sea dwellers great and small, underwater wildlife filming hints and a fun ocean quiz.
Shifting Baselines - This website presents visual proof of how oceans have changed over the past fifty years, and why it is so important to preserve them for the future.
Surfrider Foundation - Check out what rad surfers with an environmental conscience are doing to protect coastal resources. Features include daily surf and water quality conditions.
Sustainable Seas - Follow the progress of National Geographic and NOAA researchers as they study the depths of the ocean.
UN Atlas of the Oceans - Designed for policymakers, scientists, students and resource managers, this web portal features a database of biological, historical and geographical resources relating to the oceans.
U.S. Commission on Ocean Policy - Mandated by the Oceans Act of 2000, this commission is working with the states, scientific advisors and the public to develop a National Oceans Report, which will be used to make ocean and coastal policy recommendations to the president and Congress.
Virtual World: Great Barrier Reef - This National Geographic feature lets you explore a reef online. Move your mouse over the plants and animals to find related facts and photos.
Woods Hole Oceanographic Institution - This world-renowned research institution provides a searchable online library and great links for kids.