When oysters are "milky," it means they are spawning (reproducing), causing their flesh to become soft, creamy, foamy, or filled with white reproductive fluids (sperm/eggs), which changes their flavor and texture, often making them less desirable raw, especially in warmer months when spawning peaks. While some enjoy this creamy texture, many prefer oysters outside spawning season for a firmer, cleaner taste.
Fortunately, you easily can tell an oyster is spawning. “Spawning oysters look foamy and milky, even a little slimy,” says David Lentz, executive chef at the Hungry Cat in Hollywood. In theory, a good restaurant should never serve a spawning oyster.
To tell if oysters are bad, check for an open, unresponsive shell, a strong ammonia/sulfuric smell, or if the meat is dry, shriveled, or discolored; fresh oysters should have tightly closed shells that snap shut when tapped, a clear salty smell, and plump, moist meat with plenty of clear "liquor" inside. A key test is the "tap test" and "squeeze test" – if open or doesn't close when tapped, discard it; if dry or smells foul when shucked, throw it out.
If your oyster is bad, it will have a cloudy, dry, and withered appearance. Contaminated oysters will be grey, brown, black, or pink.
🦪 How To Eat An Oyster
In the northern hemisphere, the old rule that native oysters should only be eaten when there's an 'r' in the month still holds true; so eat oysters from September to April. During the summer months they're busy spawning, and their flesh becomes unpleasantly soft and milky.
If you choose to, you'll need to be wary of creamy oysters. No, not oysters served in a cream sauce. If you check your oysters and they have a creamy white looking sac on top that's small or covers pretty much the entire body, you should just send them back.
Diarrhetic Shellfish Poisoning causes nausea, vomiting, abdominal pain, and diarrhea. Diarrhea is the most commonly reported symptom.
Oyster White (RAL 1013) is a warm off-white color with a slight beige or yellowish undertone. It is named for its resemblance to the inner shell of an oyster, which has a similar soft, creamy tone.
Cooking oysters to an internal temperature of 145°F, as recommended by food safety expert Katheryn Parraga, can eliminate harmful organisms and make oysters safer to eat.
Let's recap those stats. Chance of food poisoning in the US: 1 in 7 people who eat food. Chance of oyster borne food poisoning in the US: only 1 of 438 oyster eaters.
Kumamoto Oysters: Kumamoto oysters are a smaller, sweeter variety of oysters with a delicate, creamy texture. They are native to Japan and are prized for their unique flavor. They are commonly harvested in California and the Pacific Northwest.
Fresh oysters have tightly closed shells. If an oyster shell is open, give it a tap. If it closes up quickly, you're good to go. If it stays open or closes sluggishly, steer clear.
How soon do symptoms appear? Symptoms usually appear 24-48 hours after being exposed to the virus. Sometimes symptoms appear as early as 12 hours after exposure. Most people recover in 1 to 3 days.
Discard oysters with cloudy or milky liquid.
Cloudy liquor: The natural briny juice inside the shell that keeps oysters fresh and enhances their flavor is termed "liquor". Clear liquor is ideal, but slightly cloudy liquor isn't necessarily a problem. However, if it's very cloudy or has an off smell, it's best to discard the oyster.
🦪 PSA: Creamy oysters are not a sign of poor quality – it's just part of their natural cycle! Every oyster on the planet goes through this seasonal change, especially during the warmer months of November, December, and January.
Yes, You Can Eat Australian Oysters Year-Round
You can find oysters available and safe to eat throughout the year.
Common symptoms include watery diarrhea, stomach cramps, vomiting, fever, chills. Ear and wound infections often appear red, swollen and painful. Symptoms usually appear within 12-24 hours and can last 1-7 days.
Cook oysters before eating to reduce your risk of food poisoning. Do not let raw seafood, its drippings, or its juices contaminate other foods. You cannot tell if an oyster has germs by looking at it. Hot sauce and lemon juice do not kill germs.
Foodie tradition dictates only eating wild oysters in months with the letter “r” – from September to April – to avoid watery shellfish, or worse, a nasty bout of food poisoning. Now, a new study suggests people have been following this practice for at least 4,000 years.
It's always been possible to get sick from eating raw oysters, it's just incredibly rare. If the oysters are handled properly throughout the chain of custody, then it's near zero percent chance of getting sick."
Mignonette sauce is a condiment made with minced shallots, cracked pepper, and vinegar traditionally served with raw oysters. The French term mignonnette originally referred to a sachet of peppercorns, cloves, and spices used to flavor liquids, but now means cracked pepper.