American Oceans Campaign
Oceana is the largest international Ocean Protection Restoration Environmental advocacy group dedicated to protecting and restoring the world's oceans and its sea turtles, sharks, dolphins whales, endangered species, and marine ecosystems.
https://www.oceana.org/
United Nations Atlas of the Oceans
Science, Environment, Water Resources, Oceans - United Nations Atlas of the Oceans. Extensive information resource on the world's oceans, including geography, biology, physical dynamics, human uses of marine resources, and issues and concerns.
http://www.oceansatlas.org/
Welcome to Save the Swilly
Science, Environment, Water Resources, Oceans - Save The Swilly. Information about the potential adverse impacts of aquaculture, the legal situation of aquaculture in Ireland, and about Lough Swilly, County Donegal, and concerns about aquaculture licenses there.
http://www.loughswilly.com
NOAA's National Ocean Service
Science, Environment, Water Resources, Oceans - 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.
http://nos.noaa.gov