Live Shellfish Holding and Storage in Food Businesses

Live shellfish such as oysters and mussels must reach the customer alive to be safe. Keep them cool but never frozen, never submerged in fresh water and never in sealed airtight containers, so they can breathe. Check every delivery is alive, keep the supplier's harvest and dispatch documentation for traceability, and store at a controlled temperature. Once a shellfish dies, is shucked or is cooked, the danger zone rules apply. Key takeaways: Live bivalve molluscs must stay alive until served or cooked. Keep them cool but never frozen, never sitting in fresh water or melt-water, and never in a sealed airtight container, because they need to breathe.. Check that shellfish are alive on delivery and again before service: intact shells that are closed or that close when tapped are alive; gaping shells that do not close, and cracked or broken shells, should be discarded.. The temperature danger zone is 5-60°C. Hold live shellfish cold at 5°C or below, and once a shellfish dies, is shucked or is cooked, treat it as a potentially hazardous ready-to-eat food under the 2-hour/4-hour rule.. Keep the supplier's harvest and dispatch documentation so you can trace every batch one step back to its approved harvest area and one step forward to where it was used — this matters for biotoxin closures and recalls.. Molluscs are one of the declared allergens under Standard 1.2.3, so shellfish must be clearly identified and kept separate from allergen-sensitive preparation.. Why live shellfish are a high-risk food Bivalve molluscs — oysters, mussels, clams (pipis), scallops and cockles — are filter feeders. They pump large volumes of water through their bodies, and in doing so they can concentrate bacteria such as Vibrio, viruses such as norovirus and hepatitis A, and naturally occurring marine biotoxins from the surrounding water. Because these products are frequently eaten raw or only lightly cooked, there is little or no cooking step to destroy those hazards, which is why control has to start well before the shellfish reach the plate. The Australia New Zealand Food Standards Code (Standards 3.2.2 and 3.2.2A) requires food businesses to receive, store and handle potentially hazardous food in a way that minimises the growth of pathogens and keeps food safe and suitable. For live shellfish, that means sourcing from a reputable supplier drawing on approved harvest areas, keeping the animals alive and cold, and being able to prove where each batch came from. Molluscs are also one of the declared allergens under Standard 1.2.3, so they must be identified and managed to prevent cross-contact. Filter feeders concentrate bacteria, viruses and biotoxins from the water they live in.. Often eaten raw or lightly cooked, so there is no reliable cook step to rely on.. Live shellfish must be sourced from suppliers using approved, monitored harvest areas.. Molluscs are a declared allergen and must be managed to prevent cross-contact.. Receiving live shellfish and checking they are alive Inspect every delivery on arrival. Live shellfish should be received cold, in their original packaging, with shells intact. The single most important check is that they are alive: an alive bivalve holds its shell tightly closed, or closes it when gently tapped or handled. Shells that gape open and do not close when tapped, and any that are cracked, broken or badly damaged, should be set aside and discarded rather than served. Do not accept product that arrives warm, that smells strongly of ammonia or is otherwise clearly off, or that has no accompanying documentation. Live bivalve molluscs should arrive with dispatch or harvest documentation identifying the supplier and the harvest batch or area. Record the delivery: supplier, the batch or harvest identifier, the date received and the temperature at receipt. Reject and document anything that fails these checks so there is a clear record of the decision. Alive shellfish are closed, or close when tapped; discard gaping shells that will not close.. Reject cracked, broken or badly damaged shells.. Reject deliveries that are warm, smell of ammonia or strongly off, or lack documentation.. Record supplier, batch/harvest identifier, date and temperature at receipt.. Storing live shellfish so they stay alive Live shellfish need to breathe, so how you store them is different from most chilled foods. Keep them cool but never freeze them, and never seal them in an airtight bag or container, which suffocates them. Store them in their original vented packaging or in an open container loosely covered with a clean, damp cloth to keep them moist without drowning them. Never submerge live shellfish in fresh water or tap water — fresh water kills them. For the same reason, do not let them sit in a pool of melt-water at the bottom of a container; raise them on a rack or drain regularly so any liquid runs away. Oysters are best stored cup-side down (the deeper, rounded shell underneath) so they retain their natural liquor. Keep shellfish separate from, and where possible below, ready-to-eat foods to avoid drips and cross-contamination, and keep them away from strong-smelling foods that can taint them. Keep cool, but never freeze live shellfish.. Never store in a sealed, airtight bag or container — they must breathe.. Never submerge in fresh water and never leave sitting in melt-water; drain or rack them.. Cover loosely with a clean damp cloth; store oysters cup-side down to keep their liquor.. Keep separate from and below ready-to-eat foods; keep away from strong odours.. Temperature control and the danger zone The temperature danger zone is 5-60°C, the range in which pathogens multiply fastest. Hold live shellfish cold, at 5°C or below, throughout receipt, storage, display and service. Chilled display for raw oysters should keep the product cold rather than allowing it to warm on a bed of ice that has drained away; check and record temperatures the same way you would for any potentially hazardous food. The moment a shellfish dies, is shucked, or is cooked, it stops being a living animal protecting itself and becomes a potentially hazardous ready-to-eat food. From that point the 2-hour/4-hour rule applies to time spent in the danger zone: under 2 hours it can be refrigerated or used; between 2 and 4 hours it should be used immediately and not returned to the fridge; beyond 4 hours it must be discarded. If you cook shellfish, cook to a core temperature of 75°C to control bacterial hazards — though cooking does not destroy marine biotoxins, which is why sourcing from approved harvest areas matters. Hold live shellfish at 5°C or below; the danger zone is 5-60°C.. Once dead, shucked or cooked, treat as a ready-to-eat potentially hazardous food.. Apply the 2-hour/4-hour rule to time in the danger zone: <2h use or chill; 2-4h use now; >4h discard.. Cook shellfish to a 75°C core; cooking controls bacteria but not marine biotoxins.. Shelf life, stock rotation and when to discard Live shellfish are perishable and have a short shelf life. Rotate stock on a first-in, first-out basis and use within the supplier's recommended use-by period. Because the safety of the product depends on the animal being alive, the use-by window assumes correct cold, breathing storage the whole time — mishandling shortens it regardless of the printed date. Check shellfish again immediately before shucking or serving. Discard any that are gaping and will not close when tapped, any with cracked or broken shells, and any that smell strongly of ammonia or are otherwise clearly off. When in doubt, throw it out: a single dead or spoiled shellfish is not worth the risk of foodborne illness. Never try to “revive” shellfish that have warmed up or dried out, and do not top up an old batch with new stock in the same container, which defeats rotation and makes traceability impossible. Rotate first-in, first-out and use within the supplier's use-by period.. Re-check that each shellfish is alive immediately before shucking or serving.. Discard gaping shells that will not close, cracked shells and anything smelling of ammonia or off.. Do not mix new stock into an old batch — it breaks both rotation and traceability.. Traceability, records and recalls Traceability is a core control for shellfish because problems such as biotoxin blooms or viral contamination are often identified at the harvest-area level after the product has been distributed. Keep the harvest and dispatch documentation that comes with each batch so you can trace it one step back to the supplier and approved harvest area, and one step forward to when and where you used it. Good receiving records — supplier, batch identifier, date and temperature — are what make a fast, targeted response possible. Harvest areas are opened and closed based on monitoring, and affected product can be subject to a recall. Have a documented process for acting on a recall or an authority alert: identify affected stock by batch, withdraw it from sale and service immediately, and follow the recall instructions. Because molluscs are a declared allergen, make sure menus and labelling identify shellfish clearly and that preparation avoids cross-contact for customers with an allergy. Keep dispatch/harvest documentation for every batch to trace one step back and one step forward.. Maintain receiving records so affected stock can be identified quickly by batch.. Have a documented recall response: identify by batch, withdraw immediately, follow instructions.. Identify molluscs clearly on menus and labelling and prevent allergen cross-contact.. Checklist: Delivery received cold, in intact packaging, with harvest/dispatch documentation. Each shellfish alive: shells closed or closing when tapped. Cracked, broken and gaping-that-won't-close shells discarded. Supplier, batch/harvest identifier, date and receipt temperature recorded. Stored at 5°C or below, never frozen. Stored in vented packaging or open container under a clean damp cloth, never sealed airtight. Not submerged in fresh water and not sitting in melt-water; drained or racked. Oysters stored cup-side down; shellfish kept below and away from ready-to-eat foods. Stock rotated first-in, first-out within the use-by period. Re-checked alive before shucking or service; 2-hour/4-hour rule applied once shucked or cooked. Molluscs identified on menus/labelling and cross-contact prevented. Common mistakes: Sealing live shellfish in an airtight bag or container, which suffocates and kills them.. Submerging live shellfish in fresh water or leaving them sitting in melt-water, which kills them.. Freezing live shellfish that are meant to be served alive.. Serving gaping shells that do not close, or cracked and broken ones, instead of discarding them.. Topping up an old batch with fresh stock in the same container, breaking rotation and traceability.. Throwing away the dispatch/harvest documentation, leaving no way to trace a batch during a recall or biotoxin closure.. Assuming cooking makes any shellfish safe — cooking does not destroy marine biotoxins, so approved-source sourcing still matters..