The Environment Envir. Center for Marine Conservation Excellent site full of useful marine conservation information and dedicated to protecting the diversity and health of the oceans. Dolphin Link Complete with sound, this is a great site for dolphin and whale lovers.
Films are available and they also take divers on their film expeditions.
This group has many volunteer-vacation projects throughout the world each year. Several dive projects study marine environments and provide valuable research information. Check out their page full of activities and eco-info. Sign up for membership and be a fish counter on your next dive trip. SeaWeb Great site full of ocean info, extensive list of links.