Brittany enters the novel’s marine-health crisis through a lobster associated with the region, not through a directly depicted investigation on its territory. After the lobster exploded at Troisgros in Roanne, its uncertain connection to illness and death made Brittany a focal point in Bernard Roche’s attempt to trace a threat that seemed to extend beyond one restaurant.

The lobster linked to Brittany

The lobster that exploded in the kitchen at Troisgros is identified as a Brittany lobster. Chef-poissonnier Jean Jérôme died after failing to emerge from a coma, and his body had not recovered from severe toxic shock. The cause remained unconfirmed: there was no conclusive proof that the lobster, or the substance found inside it, had caused his death. The association was compelling, but still circumstantial.

From a local incident to wider concern

The restaurant’s staff also became ill, with dizziness, nausea, migraines, and difficulty concentrating; the apprentice who had placed the mysterious substance in a jar was the worst affected. The incident threatened Troisgros with closure. Meanwhile, reports of similar symptoms and deaths elsewhere in France led Roche to suspect that the problem was not confined to the restaurant. Reports from Paris and other cities included shellfish-poisoning allegations, unpalatable lobsters, and lobsters leaking before cooking. Brittany’s association with the lobster thus connected the region to a broader pattern, without establishing it as the sole source or site of the suspected contamination.

An unresolved source

Roche initially felt guilty for not examining the water samples sooner, then set aside his other work to analyze them. He found additional chemicals he could not explain and urgently sought fresh samples, but no one elsewhere had preserved the substance. The lobster at Troisgros was the only one reported to have exploded, leaving Roche to rely on speculation about its contents: one organism had been jelly-like and disintegrated, while another remained alive and plentiful. The evidence leaves Brittany’s precise role unresolved; the region is associated with the suspected lobster, while the cause and wider reach of the illness remain uncertain.