I observed many live specimens of the Eastern Oyster, Crassostrea virginica, during a research cruise by a team of Texas A&M University-Corpus Christi to monitor oyster health. The oysters where collected with a small dredge (as seen in some photos), and a few specimens from each station were brought to the lab for several measurements and test, including the Gonadosomatic Index. Also, several environmental parameters such as water temperature, salinity, etc., were measured.
Also observed among the oysters were some Santo Domingo mussels, Brachidontes domingensis (see other entry), as seen on one photo, and the tiny ecotoparasite gastropod, Boonea impressa.
Copano Bay has several oyster reefs, and several of the beaches around the bay have lots of shells, most of them of Eastern Oyster, Crassostrea virginica. There are shells of many other species on the beach at this location, but typically the oysters are more numerous and have the largest shells.
I did not observe live oysters at this location, but I did see several nearby during a research cruise to Copano Bay on a different date.
Here is a Crassostrea gigas or Pacific Oyster, about 4” across, found living on the side of the dock at the marina. A Short Plumose Anemone was nestled on top.
Two live Pacific Oysters on a rock at low tide. These are not native. This beach is seeded for lots of shellfish, and maybe oysters, too?
Huguenot Memorial Park, Duval Co., FL April 3, 2014
Helen Cooper Floyd Park, Duval Co., FL March 29, 2014