Cold chain logistics for seafood: Requirements and challenges in the transport network

How temperature control ensures the quality of seafood

Cold chain logistics for seafood presents a complex challenge due to the particular sensitivity of these products. For seafood, uninterrupted temperature control from catch to consumption is crucial for quality, shelf life, and food safety. This report analyzes the specific requirements and challenges associated with the seafood transport network and highlights current developments and potential solutions.

Fundamentals of cold chain logistics for seafood

The cold chain describes a continuous temperature control system that is divided into four essential stages: production, storage, transport, and delivery. This system is particularly critical for seafood, as even slight temperature fluctuations can significantly impair its quality. Essentially, it's about keeping a product within a defined temperature range from its origin to the end consumer.

Seafood is among the most sensitive foods to temperature fluctuations. Even slight deviations from the specified temperature range can compromise the product's quality and safety and accelerate spoilage. This makes maintaining a constant temperature throughout the entire supply chain a particular challenge.

The global cold chain logistics market was valued at USD 293.58 billion in 2023, underscoring the economic importance of this sector. Rising consumer demand for perishable goods such as seafood continues to drive growth, while at the same time, requirements for quality and safety are increasing.

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• The global market for cold chain logistics is experiencing dynamic growth, whether in Europe, North America or Asia-Pacific

Temperature requirements for seafood

Temperature requirements for seafood are strictly defined and must be precisely adhered to. Fresh seafood should be chilled to 0 to 2°C immediately after being caught, preferably in melting ice. Frozen seafood products must be kept at a temperature of -18°C or below throughout. Compared to other foods such as beef (maximum 7°C) or poultry (maximum 4°C), fish must not exceed 2°C, highlighting its particular sensitivity.

Challenges in the seafood transport network

Temperature control along the complex supply chain

One of the biggest challenges is maintaining a constant temperature throughout the various stages of the supply chain. The complexity of modern supply chains, with their many distribution channels and long transit routes, makes temperature control particularly demanding. Every transition between different modes of transport or storage facilities carries the risk of temperature fluctuations or physical damage.

The coordination of multiple parties, including suppliers, transport providers, and warehouse operators, increases the difficulty of ensuring an unbroken cold chain. This often leads to delays and gaps in communication and data exchange. These risks are particularly pronounced over long transport routes across multiple countries or continents.

Technical and logistical challenges

Special vehicles with refrigeration units are required for transporting seafood. These must function reliably and maintain the prescribed temperatures at a constant level. However, reality reveals alarming shortcomings: almost one in three refrigerated transports of fish or meat in Germany is too warm. Particularly worrying is the finding that, according to a study, 13 percent of drivers don't even know the required refrigeration temperature.

A recent example illustrates the potential consequences: In March 2025, a 42-year-old driver was stopped in Ingolstadt transporting approximately 250 kilograms of meat, fish, and seafood in a van without refrigeration. The products had to be destroyed because the cold chain was broken and some items had even expired.

Energy consumption and operating costs

Operating refrigerated trucks and cold storage facilities is associated with significant energy consumption. Fuel costs and efficient fuel consumption management pose major challenges for cold chain providers. Companies in the cold chain incur considerably higher annual operating costs per cubic foot. This raises not only economic questions but also environmental concerns regarding the carbon footprint.

Innovative technologies and solutions

Modern cooling and monitoring systems

To meet the challenges of cold chain logistics, companies are increasingly relying on advanced technologies. Leading logistics companies like MSC have state-of-the-art cooling and dehumidification technology, including settings for controlled atmosphere (CA) climate control and ventilation openings to ensure optimal airflow. DFDS offers specialized refrigerated transport with built-in cooling systems that maintain goods at a controlled temperature throughout the entire transport process.

In Japan, modern technologies such as the Internet of Things (IoT) are being used to improve cold chain operations and ensure that products are kept within the correct temperature range throughout the supply chain. In 2022, the expected value of user spending on the Internet of Things in Japan was USD 6.8 billion.

Digitization and real-time monitoring

Digitalization in cold chain logistics enables real-time temperature monitoring and immediate response to deviations. Minew, for example, offers a cold chain monitoring solution consisting of BLE sensor tags, asset trackers, and Bluetooth beacons to ensure continuous monitoring. These technologies help increase transparency and identify potential problems early on.

Thermometers and temperature monitoring systems are essential for continuous temperature checks. Modern technologies such as RFID sensors can be used for automated temperature monitoring, providing additional security throughout the entire cold chain. It is advisable to use a digital temperature recording system to document compliance with the cold chain.

HACCP concept and legal requirements

To minimize the risks of an interrupted cold chain, legal regulations have been established. The HACCP concept (Hazard Analysis and Critical Control Points) is a mandatory, internationally valid quality assurance system for food. It encompasses the comprehensive recording and monitoring of temperatures throughout the production process, from transport to storage.

A key element of official monitoring is the review of internal controls based on a HACCP system. These must comply not only with the general hygiene regulations according to Annex II of Regulation (EC) No 852/2004, but also with the specific hygiene requirements of Regulation (EC) No 853/2004.

Consequences of failing to maintain the cold chain

The consequences of a broken cold chain can be serious. If the cold chain for sensitive products is interrupted, bacteria and dangerous microorganisms can form and multiply in the food. These can cause illnesses such as food poisoning. Every year in Germany, more than 100,000 people are infected with pathogens through food, often leading to stomach cramps, diarrhea, and vomiting.

In addition to health risks, economic damage can also occur. A break in the cold chain always affects food quality, and products can lose their specific properties. Furthermore, the best-before or use-by date can be significantly shortened.

Suitable for:

• Cold chain logistics: Japan is the world leader in fresh produce logistics and refrigerated logistics - e-commerce continues to drive development

Specific requirements for seafood transport

From catch to processing

In industrial fishing, seafood is often slaughtered, scaled, gutted, and possibly filleted on board the vessel. On smaller ships, further processing sometimes takes place on land. To ensure high quality, seafood should be chilled or frozen as quickly as possible after being caught.

One example of advanced processing methods is the RSW (refrigerated seawater) system, in which fish are temporarily stored and pre-cooled in special tanks flooded with chilled seawater or liquid ice. After sorting, specialized equipment such as vertical plate freezers can be used to freeze, for example, mackerel into manageable blocks, which are then stored at -25°C in insulated storage rooms.

Transportation options and requirements

Several transport options are available, including three-layer polyethylene containers filled with water and ice for whole, gutted fresh fishery products. Transport in such containers must not exceed three days. An alternative method is superchilling, where the core temperature of the product must be between -0.5 and -2°C. The transport and storage period for superchilled fishery products must not exceed five days.

Frozen fishery products must be stored at a temperature of -18°C or below throughout the entire product. Brief temperature fluctuations of no more than 3°C upwards are permitted during transport, but the temperature of -18°C must be maintained at all times.

Current developments in global maritime freight

Current developments in maritime freight are having a significant impact on global supply chains and seafood logistics. Since the end of 2023, freight rates in maritime shipping have risen sharply and exhibit high volatility. The main reasons for this are the avoidance of the Suez Canal due to increased security risks in the Red Sea and the associated detours around the Cape of Good Hope. This route, which is approximately 6,000 kilometers longer, leads to higher fuel costs and extended transit times, reducing available capacity and further driving up freight rates.

The expansion of the seafood industry in China is attributed to various factors, including technological advancements in processing, packaging, and storage. In 2023, China maintained its position as the world's leading seafood producer, with official estimates reaching 71 million tons, a 3.5 percent increase compared to 2022.

Recommendations for optimizing the transport network

Continuous monitoring and documentation

Effective cold chain logistics for seafood requires continuous temperature monitoring and documentation. Companies should invest in reliable temperature monitoring systems and conduct regular checks. Documentation should be comprehensive and cover all transfer points in the supply chain.

It is recommended to implement a HACCP concept tailored to the specific requirements of seafood. This includes identifying critical control points, setting limits, monitoring these points, and defining corrective actions in case of deviations.

Integration of technologies

Integrating modern technologies can significantly improve the efficiency and safety of cold chain logistics for seafood. IoT devices, real-time monitoring, and automated alarm systems enable precise monitoring and rapid response to problems. Multimodal transport, which optimally combines different modes of transport, can contribute to fuel cost savings.

Companies should also invest in energy-efficient refrigeration technologies to reduce both operating costs and their environmental footprint. MSC, for example, invests heavily in the latest environmentally friendly technology, systems, and processes to contribute to the cleanliness of the oceans, land, and cargo.

Training and process optimization

Insufficient staff training regarding the importance of the cold chain is a common challenge. Companies should therefore invest in regular training to ensure that all employees are aware of temperature requirements and understand the importance of the cold chain.

Regular maintenance of refrigeration equipment plays a crucial role in preventing technical problems. This includes checking the cooling units, ensuring the ventilation slots are clear, and monitoring the door seals. Malfunctions are thus detected early and can be rectified before they lead to an interruption of the cold chain.

Optimized cold chain logistics: Technologies for maximum food safety

Due to the particular sensitivity of seafood, cold chain logistics places high demands on the transport network. An unbroken cold chain is key to food safety and quality preservation. The challenges range from maintaining constant temperatures and coordinating various stakeholders to ensuring energy efficiency.

Modern technologies and innovative solutions offer promising approaches to optimizing cold chain logistics. The integration of IoT devices, real-time monitoring, and energy-efficient refrigeration systems can help ensure the quality and safety of seafood while simultaneously reducing operating costs.

Given the growing importance of the cold chain market and increasing consumer demand for seafood, optimizing the transport network is becoming a crucial competitive factor. Companies that invest in modern cold chain logistics and consider the specific requirements of seafood will be successful in the long term and contribute to the safety and quality of these delicate foods.

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