They will last up to 3 months in salt water but they need to remain chilled so i would also keep them in the refrigerator.
About 5 - 7 days. When you store fresh oysters in the shell in the refrigerator, leave the grit and dirt on them. This helps insulate and keep the oysters moist. Make sure they have air, do not put them in a sealed plastic bag because they need to breathe. Put them in a burlap bag or cover them with a damp towel. When ready to shuck, run under cold water, and scrub with a stiff brush.
only a couple of hours
Oysters in the shell must be sold live. They should feel heavy and full of water. Live ones will be tightly clamped shut. Dead oysters will have loose shells and must be discarded along with those which have broken shells. The flavor is best when they are consumed within 24 hours of purchase.Store live oysters in the shell, large shell-side down, in a mesh bag or in an open container covered with a damp cloth in the refrigerator (no lower than 33 degrees F or zero degree Celsius) up to five days.Do notseal live oysters in an airtight container -- they will not be able to breathe and will die.Never freeze unshelled oysters. You can refrigerate freshly-shelled oysters in their own liquor for two days, but use them as quickly as you can.
I have seen mussels attached to oysters and barnacles.
with shell phones
it has a hard shell
crab and oysters
Man, Shell fish and oysters
Mussels, oysters
The calcium shell protecting the muscle inside.
By developing a protective shell
Clams, oysters, mussels, abilone, scallops.