Seafood should be kept very cold during transport, ideally on ice, but not directly submerged in fresh water. Melting ice creates fresh water which can be absorbed by the seafood, negatively impacting its flavor and texture.
Maintaining a low temperature is crucial for preserving the quality and safety of seafood during transport. Bacteria multiply rapidly at room temperature, so keeping seafood cold slows down this process significantly. The ideal temperature range is between 32°F and 40°F (0°C and 4°C).
While ice is an excellent cooling agent, directly submerging seafood in fresh water can be detrimental. Fresh water is hypotonic compared to the fluids in seafood. This means that water will move into the seafood through osmosis, diluting its natural flavors and making the texture mushy.
The best practice is to place the seafood in a container that allows for drainage. Then, surround the container with ice. This keeps the seafood cold without direct contact with the melting ice water. You can also use gel packs or other cooling materials as alternatives to ice, ensuring they don't directly touch the seafood. Proper insulation of the container is also important to maintain the cold temperature for longer periods.
Use a layer of plastic wrap or parchment paper between the seafood and the ice to further prevent direct contact with melting ice water and potential freezer burn if the transport time is extended.