A:
AIRD: Aquatic Invasions Research Directory - A free database designed to promote information transfer, coordination, and collaborative research on the invasion of aquatic ecosystems. [Ad Hoc Organizations, Smithsonian Institution, Smithsonian Environmental Research Center]

C:
Center for Coastal Environmental Health and Biomolecular Research (CCEHBR) - Conducts interdisciplinary research to resolve issues related to coastal ecosystems health and environmental quality, including public health impacts [Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS)]

Central Southwest Gulf Coast Information Node - Gateway to biological information for Arkansas, Louisiana, Oklahoma, Texas, and the Gulf of Mexico, including the coastal areas of Mississippi, Alabama, and Florida. [Department of the Interior, U.S. Geological Survey (USGS), National Biological Information Infrastructure]

H:
Habitats - Resources related to Earth is host to desert, forest, marine, montane, prairie, tundra and wetland habitats, each of which supports its own specialized plant, animal, and microbial species assemblages. [Department of the Interior, U.S. Geological Survey (USGS), National Biological Information Infrastructure]

I:
Informatics and Collection Databases - Searchable lists of specimens, illustrations, anthropological collections, and summary information about the National Museum of Natural History collections. [Ad Hoc Organizations, Smithsonian Institution]

M:
Marine Invasion Research Lab - A national and international center for research on biological invasions in coastal marine ecosystems. [Ad Hoc Organizations, Smithsonian Institution, Smithsonian Environmental Research Center]

N:
NEMESIS: National Exotic Marine and Estuarine Species Information System - A resource for information on non-native (or exotic) species that occur in coastal marine waters of the United States [Ad Hoc Organizations, Smithsonian Institution, Smithsonian Environmental Research Center]

NOAA Marine Debris Program - The NOAA Marine Debris Program serves as a centralized marine debris capability within NOAA in order to coordinate, strengthen, and increase the visibility of marine debris issues and efforts within the agency, its partners, and the public. [Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA)]

NOAA National Marine Sanctuaries - Information about the marine life and extraordinary habitats that make up your nation's marine sanctuaries and our continuing efforts to conserve these ocean and coastal treasures [Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA)]

NOAA Restoration Center - The focal point for marine and estuarine habitat restoration within NOAA. [Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA)]

Northeast Fisheries Science Center (NEFCS) - Expertise in the marine resources of the Northeast Continental Shelf Ecosystem from the Gulf of Maine to Cape Hatteras [Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Marine Fisheries Service (NMFS)]

Northwest Fisheries Science Center (NWFSC) - Responsible for providing scientific and technical support for the management, conservation, and development of the Pacific Northwest region's anadromous and marine fishery resources [Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Marine Fisheries Service (NMFS)]

S:
Southeast Fisheries Science Center (SEFSC) - Provides support to large marine ecosystems programs [Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Marine Fisheries Service (NMFS)]

Southwest Fisheries Science Center (SWFSC) - Conducts research on living marine resources and their environment throughout the Pacific and in the Antarctic [Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Marine Fisheries Service (NMFS)]