NOAA's National Ocean Service
Science, Earth Sciences, Oceanography, Data Centers - National Ocean Service. Information on environmental monitoring, coastal monitoring and assessment, water quality, biodiversity, aeronautical chargting and cartography, nautical charting and cartography, national marine sanctuaries (United States).
http://nos.noaa.gov/
IODE - Home
International Oceanographic Data and Information Exchange (IODE) of IOC
https://iode.org/
U.S. National Oceanographic Data Center
The National Oceanographic Data Center (NODC) is one of three discipline-oriented environmental data centers operated by the National Oceanic and Atmospheric Administration (NOAA). NODC ensures that oceanographic data collected at great cost (by federal, state, local, foreign government agencies, universities, and private industry) is preserved and maintained in a permanent archive where they are available for use by scientists, resource managers, planners, and others. NODC holds physical, chemical, and biological oceanographic data from coastal and deep ocean areas.
https://www.nodc.noaa.gov/
European Centre for Information on Marine Science and Technology
Science, Earth Sciences, Oceanography, Data and Information Resources - European Centre for Information on Marine Science and Technology. The EurOcean Internet portal is a focal point of information for all actors with interest in marine science and technology.
https://www.eurocean.org/
NOAA, Ocean Explorer
Science, Earth Sciences, Oceanography, Data and Information Resources - NOAA Ocean Explorer. An educational internet offering for all who wish to learn about, discover, and virtually explore the ocean realm.
https://oceanexplorer.noaa.gov/
NOAA's Coral Reef Information System
NOAA's Coral Reef Information System (CoRIS) is designed to be a single point of access to NOAA coral reef information and data products, especially those derived from NOAA's Coral Reef Conservation Program.
https://www.coris.noaa.gov/
CoastLearn
Science, Earth Sciences, Oceanography, Data and Information Resources - Coastlearn. Offers a multimedia distance learning package on Integrated Coastal Zone Management (ICZM) in Central & Eastern Europe.
https://www.coastlearn.org/
United Nations Atlas of the Oceans
Science, Earth Sciences, Oceanography, Data and Information Resources - United Nations Atlas of the Oceans. an information system designed for use by policy makers who need to become familiar with ocean issues, and by scientists, students and resource managers who need access to underlying data bases and approaches to sustainability.
https://www.oceansatlas.com/