This journal article references growth, population abundance, and size distribution data of invertebrate species: Protothaca staminea and Saxidomus giganteus from Simpson Bay, Prince William Sound, Alaska. The aforementioned data are referenced in citation: Nickerson, R. B. 1977. A study of the littleneck clam (Protothaca staminea Conrad) and the butter clam (Saxidomus giganteus Deshayes) in a habitat permitting coexistence, Prince William Sound, Alaska. Proc. Natl. Shellfish. Assoc., Md., 67: 85-102. This literature was collected as part of a metadatabase that represents one or more nearshore resources (from physical attributes such as water and air, to birds and mammals). Each entry is viewable in three formats, 1) a geospatial explicit format (ArcView 3.3) named GIS ArcView 3.3 Near GEM project, 2) a spreadsheet format (Excel 2002 and within ArcView) named GEM Nearshore Metadata Set, and 3) a ProCite database named GEM Nearshore Metadata References, which consists of references included in 1 and 2 above. The ProCite database record number corresponds to the Excel Procite Number. Reference Procite #714 for this literature's metadata. The metadata are maintained in digital format (ArcView 3.3, Excel 2002, and Procite) and are available from the Alaska Science Center, USGS in Anchorage, Alaska. For a detailed description of the three databases and the project, see "Bodkin, J. L., and T. Dean. 2003. Alternative Sampling Designs for Nearshore Monitoring (Gulf Ecosystem Monitoring and Research Project G-030687), US Geological Survey, Alaska Science Center, Anchorage, Alaska." available on-line at http://www.evostc.state.ak.us/pdf/GEM_final_reports/030687.pdf.