A single adult oyster can filter up to 50-gallons of water in a single day. For this reason, they may be one of the most important species when it comes to ensuring the health of the Chesapeake Bay.
Some basic information about the Eastern Oyster from NOAA.
The Baltimore Sun provides a timeline of the history of oysters in the Chesapeake Bay.
The North Carolina Sea Grant has a video about the life cycle of oysters.