Here are references -- links when available and no guarantee they work!
Allee, R.J., M. Finkbeiner, B. Stevenson and K. Goodin. 2007. Coastal and Marine Ecological Classification Standard (CMECS) Version III. NOAA Coastal Service Center, Charleston, SC.
Greene, H.G., Bizzarro, J.J., O’Connell, V., and Brylinsky, in press, Mapping potential marine benthic habitats using geographic information systems: a classification scheme and attributing code, in Todd, B., and Greene, H.G., eds., Mapping of the Seafloor for Habitat Characterization, Canadian Geological Association Special Paper 47 (2007).
ICES Marine Habitat Mapping Working Group Reports
Kutcher et al. 2005. A recomendation for a comprehensive habitat and land use classification system for the National Estuarine Research Reserve System.
Lanier, A., C. Romsos, et al. (2007). "Seafloor habitat mapping on the Oregon continental margin: A spatially nested GIS approach to mapping scale, mapping methods, and accuracy quantification." Marine Geodesy 30: 51-76.
Lund, Katherine and Tony Wilbur. 2007. Habitat Classification Feasibility Study for Coastal and Marine Environments in Massachusetts. Massachusetts Coastal Zone Management. 63 pp.
Madden, et al. 2005 Coastal/Marine Systems of North America: Framework for an Ecological Classification Standard: Version II NatureServe, Arlington, VA. 58 pp.
NOAA Coastal Services Center. 2007. Mapping Benthic Habitat. Coastal Connections, June/July.
Todd, B., and Greene, H.G. 2007. Mapping of the Seafloor for Habitat Characterization, Canadian Geological Association Special Paper 47.
Valentine, P. C., B. J. Todd, et al. 2005. Classification of marine sublittoral habitats, with application to the northeastern North America region. American Fisheries Society Symposium 41: 183-200.