Keep live crawfish cool, shaded, damp and exposed to fresh air. The most reliable household setup is a breathable sack inside a drained cooler, with ice cooling the sack without leaving the crawfish submerged. Cook them as soon as practical; storage and handling time increase mortality.
The basic setup
Louisiana Sea Grant summarizes the goal as keeping crawfish “cool, moist and with some fresh air.” Their gills must remain wet while still receiving air, so a sealed container or standing water is dangerous.
- Container: Use the clean, breathable sack in which the crawfish were sold when possible. Louisiana Sea Grant specifically describes onion sacks as suitable for keeping crawfish alive.
- Location: Keep the sack in shade and away from warm conditions or direct sunlight.
- Moisture: Keep the sack damp, not underwater. Ice placed on top can cool the sack while melting water keeps it moist.
- Drainage: Use a cooler that lets meltwater drain or arrange the sack so water cannot pool around the crawfish.
- Air: Do not seal the sack or cooler in an airtight container.
How to hold crawfish in a cooler
- Leave the crawfish in a breathable mesh or onion sack. If the sack is dirty, use a clean food-safe replacement that allows airflow.
- Place the sack in an insulated cooler kept in the shade.
- Add crushed ice on top of the sack rather than filling the cooler with water. Keep the drain open, or empty meltwater before it reaches the crawfish.
- Keep the crawfish cool and damp while maintaining ventilation. Do not compress the sack under heavy items.
- Cook them as soon as practical. Louisiana Sea Grant and the LSU AgCenter describe overnight cooler holding, but that example is not a guaranteed survival limit for every shipment, cooler or ambient temperature.
Temperature guidance
The Texas Crawfish Production Manual (Texas A&M AgriLife Extension, 2024) recommends cooler storage at 38–41°F with high humidity. This is production-storage guidance, not a promise that every household cooler will hold that range or that crawfish will survive indefinitely at it. A cooler thermometer can help you check the actual temperature.
Cooler versus a shaded location
| Option | Strength | What you must control |
|---|---|---|
| Drained insulated cooler | Best temperature control and protection from sun | Airflow, dampness and meltwater drainage; prevent submersion |
| Shaded cool location | Works for short holding when a cooler is unavailable | Keep the sack damp, ventilated and away from heat; temperature is less predictable |
Neither method establishes a universal maximum storage time. Mortality rises as storage and handling continue, so plan the cooking time before you buy or collect the crawfish.
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Why water can kill live crawfish
Do not leave bagged crawfish in a tub, bucket or Tupperware container filled with still water. Louisiana Sea Grant warns that a closed container full of water can make them suffocate. The sack may be immersed briefly to moisten it, but the January 2011 Louisiana Sea Grant/LSU AgCenter newsletter warns that leaving it immersed can also cause suffocation.
“Damp” means the gills stay wet while air can circulate. It does not mean storing the animals underwater.
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- “Due to state regulations, we do not ship live snails to Oregon (OR).”
- Approximately 2-3 inches in size.
- Maintain water temperature between 65-80°F (18-26°C) and pH level of 7.0-8.0 to support their optimal health.
- Provide a natural and colorful addition to your tank.
Rinsing, washing and purging
Rinse shortly before cooking
Wash the crawfish shortly before cooking to remove mud and debris, following the handling advice from Louisiana Sea Grant. Rinsing is a cleaning step; it is not a method for extending live storage.
Do not confuse rinsing with purging
The January 2011 LSU AgCenter/Louisiana Sea Grant newsletter distinguishes ordinary rinsing from “true purging,” which it describes as taking 12–24 hours. The same newsletter says adding salt to wash water does not purge crawfish. Do not lengthen holding time merely to pursue a purge, and do not treat salt water as a survival aid.
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- “Due to state regulations, we do not ship live snails to Oregon (OR).”
- Approximately 2-3 inches in size.
- Maintain water temperature between 65-80°F (18-26°C) and pH level of 7.0-8.0 to support their optimal health.
- Provide a natural and colorful addition to your tank.
Check crawfish before cooking
- Inspect the batch immediately before cooking.
- Discard dead crawfish; Louisiana Sea Grant notes that they decompose rapidly.
- Wash away visible debris before the cooking step.
- Keep cooked crawfish off the sack, cooler or other container that held the live shellfish. Use clean cookware and serving containers to avoid cross-contamination.
Cooking note from the cited Louisiana guidance
The January 2011 Louisiana Sea Grant/LSU AgCenter newsletter gives 145°F as an internal cooking-temperature target and says its boiling method takes 3–5 minutes after the water returns to a boil. Those figures are statements from that dated newsletter; actual time varies with batch size and method, so use current local food-safety guidance and verify the center of the food with a thermometer.
Common mistakes to avoid
- Leaving the sack submerged in a bucket, sink or cooler full of water.
- Closing crawfish in an airtight plastic bin.
- Leaving them in direct sun, a hot vehicle or another warm area.
- Allowing meltwater to pool around the sack.
- Storing them longer than necessary because they “look fine.”
- Putting cooked crawfish back into the container used for live shellfish.
The Bottom Line
For an overnight hold, keep live crawfish in a breathable sack in a shaded, drained cooler, use ice to keep the sack cool and damp, and prevent standing water and airtight sealing. Cook them promptly and discard any that are dead before cooking.
Quick Recap
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- “Due to state regulations, we do not ship live snails to Oregon (OR).”
- Approximately 1-2 inches in size.
- Maintain water temperature between 65-80°F (18-26°C) and pH level of 7.0-8.0 to support their optimal health.
- Provide a natural and colorful addition to your tank.
Rank #4
- “Due to state regulations, we do not ship live snails to Oregon (OR).”
- Approximately 2-3 inches in size.
- Maintain water temperature between 65-80°F (18-26°C) and pH level of 7.0-8.0 to support their optimal health.
- Provide a natural and colorful addition to your tank.
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