Why Shrimp Prices Are Falling in Tunisia: Separating Fact from Rumor

The recent drop in shrimp prices in Tunisia is primarily driven by an abundance of catches in the Gulf of Gabès since the fishing season resumed on October 16. However, this surge in supply has also fueled rumors regarding the origin of the products sold in local markets. Social media messages have circulated claims suggesting the presence of farmed shrimp, foreign vessels, or even radioactive contamination.

In a clarifying publication, the association TunSea refutes these accusations, noting the complete absence of scientific evidence. The organization emphasizes that the invasive nature of a species does not equate to a health risk for humans.

A Diverse Market: Local and Introduced Species

The Tunisian shrimp market features several species with distinct origins, habitats, and characteristics.

Royal Shrimp (Penaeus kerathurus): A local Mediterranean species highly valued for its size and commercial worth.
Deep-Sea Pink Shrimp (Parapenaeus longirostris): Another local species, primarily fished off the northern coast, with a portion of the production destined for export.
White Shrimp (Metapenaeus monoceros): Native to the Indian Ocean, Western Pacific, and Red Sea. Its arrival in the Mediterranean dates back to 1924, and its presence in the Gulf of Gabès was first reported in 1993. Therefore, its current presence in Tunisian markets is not a recent phenomenon linked to foreign vessels recently arriving in the country.
Pink Shrimp (Penaeus aztecus): Native to the western Atlantic coast, particularly the Gulf of Mexico. First reported in the Mediterranean in 2010, it was observed in Tunisian waters, especially in the Gulf of Gabès, in 2016. It is now a common part of local catches and market stalls.

Wild-Caught vs. Farmed: A Critical Distinction

The presence of white shrimp (Metapenaeus monoceros) in markets does not necessarily indicate aquaculture origin. TunSea highlights the importance of distinguishing between:

Metapenaeus monoceros: A marine species wild-caught in the Gulf of Gabès.
Penaeus vannamei: Native to the Eastern Pacific and widely used in international aquaculture. In Tunisia, farming experiments for this specific species are conducted at the Melloulèche aquaculture station in the Mahdia governorate.

Confusing these two species can lead to erroneous conclusions about the origin of commercialized products.

Addressing Rumors of Radioactive Contamination

TunSea states that claims circulating on social media regarding radioactive contamination are unsupported by any scientific proof or reliable laboratory analyses. The association underscores that Metapenaeus monoceros and Penaeus aztecus are well-known, consumable marine species. Their presence outside their native range does not, in itself, render them toxic or contaminated.

However, this distinction does not exempt seafood from necessary sanitary controls. The origin of a species alone cannot guarantee the safety of a specific batch; safety also depends on:

Sanitary condition
Handling practices
Storage conditions

Key Safety Concern: Cold Chain Integrity

For both consumers and professionals in fishing, transport, and distribution, the primary point of vigilance is preservation. Shrimp are highly perishable products. High temperatures, breaks in the cold chain, or poor transport and display conditions can promote bacterial growth and increase the risk of food poisoning.

TunSea reminds stakeholders that fresh shrimp must be stored at temperatures close to 0 °C, ideally using clean ice or appropriate refrigeration methods. This requirement applies to the entire supply chain, from capture and landing to transport, storage, and final sale. It is crucial to note that ice cannot restore the safety of a product that is already spoiled or contaminated.

Conclusion: Traceability and Hygiene

For companies in the seafood sector, product traceability, strict adherence to hygiene rules, and effective temperature control are essential for protecting consumers and maintaining public trust.