Frequently Asked Oyster Questions


How many different types of oysters are there?

In North America, there are 5 species of edible oysters commercially available -- 

  1. Eastern (crassostrea virginica)
  2. Pacific (crassostrea gigas)
  3. Kumamoto (crassostrea sikamea)
  4. European Flat (ostrea edulis)
  5. Olympia (ostrea conchiphila/lurida)

Oysters that commercially produce pearls are NOT in the same family as edible oysters. The edible varieties of oysters can produce pearls, but it is very rare.

Different types or "varieties" of oysters are determined by a combination of their species, location, and growth method. Oysters from one harvest location will taste similar, but they may look completely different depending on how they're grown. In short, there will always be an infinite number of oyster varieties. Learn more about why here.

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How do oysters reproduce?

Oysters are hermaphrodites and change sex based on their life stage. They typically reproduce in the summer because warm, fluctuating water temperatures trigger the oysters to spawn. Female oysters will release between 5 and 8 million eggs into the water at a time. Males also release their sperm into the water, and once the eggs encounter the sperm, the fertilization process begins.

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What's the difference between farmed and wild oysters?

Oyster farming is unique because farmed oysters are grown in their natural environment, the ocean, and they filter the same food as wild oysters. The main difference between the two is that farmed oysters are looked after by growers. Oyster farmers may use gear to protect the oysters, as well as certain techniques to promote uniformity and growth. Wild oysters grow on public beds, and are caught by shellfishermen or "diggers." The most important difference between farmed and wild is that farmed oysters are more sustainable. To understand why, read more about farmed oysters here.

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Where do oysters get their flavor or "merroir" from?

Oysters take on flavors influenced by their surrounding waters and topography very much like wine and coffee. This concept of terroir is known as "merroir" for oysters. For example, an oyster grown closer to freshwater will taste less salty than an oyster grown in a salt pond. Any number of environmental characteristics can influence an oyster's flavor such as the minerals in the sediment of the growing area, the amount of seaweed nearby, or even the type of algae the oyster may be filtering.

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How long do oysters stay fresh?

Generally, oysters stay fresh for up to 10 to 14 days from harvest. If stored properly, some oysters can stay live for over 4 weeks. There are many factors that affect an oyster's shelf life like its species or handling, so there's no straight answer, but the best way to know if your oysters are still any good is to check for closed shells and cups filled with liquor when shucked opened.

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How to store oysters?

Oysters should be stored at 38 - 43 ºF in a cooler. We recommend storing Pacific oysters on ice as they tend to be more perishable. If storing oysters at home, place them in the back of your refrigerator and cover with a damp towel. Do not store them in a plastic bag or airtight container. Make sure the oysters have adequate water drainage, especially if storing on ice, so they do not sit in a pool of water.

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What is a wet storage system?

Wet storage can be accomplished in many ways. There is ocean wet storage where harvested shellfish is stored in its natural environment. Open system wet storage has water flowing into tanks from a natural body of water. The water is then discharged back into the ocean. At Pangea, we have a closed system wet storage. We truck water from Duxbury Bay to Boston to fill our tanks, which then recirculates the water.

There are several types of filtration used to keep the water clean. The water must also be government tested weekly. If you see a wet storage date on your shellfish tag, this means the product was wet stored in some way after harvesting.

*Wet storage is different from depuration. Product from "conditional areas" must be depurated or cleansed for a certain period of time by law. Pangea does not buy from conditional areas where the product must be depurated.

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Why are oysters best in the fall?

Oysters are seasonal creatures. Like other animals, they hibernate in the winter, so to prepare for this, they build up their glycogen stores (a type of sugar) by stuffing themselves in the fall. This process makes them sweet and plump during those fall months -- an ideal state for oyster eaters. Oysters become thin after coming out of hibernation in early spring when all their glycogen reserves have been used up.

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Should I only eat oysters during months with "R"?

Oysters are safe to eat year-round. The "R" rule, which singles out the warmer months of summer (May to August), is an outdated rule when refrigeration and scientific testing was not as prevalent. Since summer tends to be the time when there are algae blooms, red tides, and higher counts of vibrio (a naturally occurring bacteria in the ocean), there are recommendations to avoid oysters during these months. However, the commercial shellfishing industry has strict regulations like closing shellfishing areas to take precautions against potential foodborne risks.

Quality is another concern during the summer. Oysters tend to be thinner during warmer months because they expend most of their energy spawning. To solve for this, look to oysters from colder waters, such as those from the Canadian Maritime, which are less likely to spawn due to cold water temperatures year-round. So, if you're craving oysters in the summer, don't let the "R" rule prevent you from slurping one back!

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Is there a right way to eat oysters?

There isn't a right way to enjoy oysters, but we highly encourage eating oysters "naked" first, basically without any condiments. Every oyster has unique notes or flavors, but when you cover it with cocktail sauce, it can mask that merroir which makes an oyster special. Even if you're a seasoned oyster eater, try new varieties naked, too. Order at least two oysters of the same variety, so you can enjoy one naked and the other however you like. Pile on that horseradish and mignonette, it's totally fair game. Sometimes an oyster may taste better because it needed a squeeze of lemon.

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Are oysters nutritious?

Yes, oysters are full of nutritional benefits! They are low in calories and saturated fats, and jam packed with vitamins and minerals. Oysters contain 2.5x the amount of iron and 10x the amount of zinc compared to beef. One serving of oysters provides more than the daily recommended value of copper for adults. They're a great source for vitamin B-12, which is essential for the function of the brain, nervous system, and blood formation.

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Are there any risks in eating oysters?

The short answer is yes, there will always be risks when eating raw or under cooked meat and seafood. It is not recommended for pregnant women and young children to eat any under cooked proteins. Although the shellfish industry has strict regulations to prevent foodborne illnesses, consumers should be fully aware of the associated risks. If you are nervous, then eat your oysters cooked, which eliminates any potential foodborne risks! They're great breaded, deep fried, and baked!

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Where can I learn how to shuck an oyster?

Watch Bekah demonstrate the most common way of shucking oysters!

If taking a class is more your style, check with your local seafood market or approach the shucker at your favorite oyster bar. The oyster community loves people who want to learn more about oysters, especially how to shuck their own!

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Where can I buy oysters and shucking gear?

If you are a restaurant or distributor, give us a call, and we will be able to assist you. If you are a consumer looking to buy oysters to shuck at home, we currently do not ship direct-to-consumer. Reach out to your local seafood market or grocery store (Wegman's and Whole Foods typically carry oysters) or check online to get them shipped directly to your door. Many growers offer direct shipment, so don't forget to check.

For at-home shucking, it's important to have proper shucking gear. We recommend the Narragansett Oyster Knife from R. Murphy -- it's full tang and super sturdy to open any size oyster. If you're a beginner, a New Haven-style knife  is nice because it has a curved tip to provide some extra leverage. The Littledeer Half Sheller plate is a great tool to assist with overhand shucking and doubles as a beautiful oyster plate. If you are an underhanded shucker, it's smart to invest in a glove.

For more gear recommendations, check out In a Half Shell's oyster gear page. It's pretty comprehensive.

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Do you offer oyster farm tours?

At this time, our Duxbury oyster farm is not open to the public. However, there are a number of other New England oyster farms that do offer tours by appointment depending on the season.

Where can I learn more about oysters?

If you want to learn more about oysters, there are many resources available out there. If you're reading this, you're already at a great starting point! Check out our blog under the "Educational" section for in-depth articles on many oyster topics including ones answered here in this FAQ. Also check out our Useful Links page for other relevant information.

One of our favorite resources is Julie Qiu's In a Half Shell blog. She has everything from great oyster reads to the oyster gear page we mentioned above. If you're in the New York area, she hosts master classes and tastings that are informational and fun.

Rowan Jacobsen, who wrote the quintessential A Geography of Oysters, recently published a great summary about oysters called "The New Rules of Oyster Eating." His rules provide a comprehensive overview to help you sound smart the next time you're at an oyster bar.

To learn more about varieties or flavor profiles on-the-go, check out the mobile apps Oystour and Pearl. You can search, find, and track your oysters easily all on your mobile device!

The best way to learn more about oysters? Ask questions and eat more of them! Seek out new varieties and ask your server about them. Where are they grown? How are they grown? Can you see the shellfish tag? Try oysters when you're in new places and continue exploring because who knows what you'll discover. The world is your oyster.

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