When you connect to the NBII Metadata Clearinghouse you will be able to search through metadata-based descriptions of biological data sets and information products from many different sources to identify those that meet your particular search criteria.
The NBII Metadata Clearinghouse: http://metadata.nbii.gov/
The NBII Home Page: http://www.nbii.gov/
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Choose San Diego Bay
Scroll down until you reach "Set Query Criteria" Menu
Under the "Medium(s):" selection choose "Organism Vegetation"
Under the "Project(s): selection choose "Eelgrass Survey, 1993 - San Diego
Bay"
"Set Output Options" is your option (100 to 5000 data records) or
HTML vs Excel/Comma Delimited
Depress "Begin Data Query"