The fire retardant in the seafood chain

A fire retardant chemical added to fishmeal during shipping has contaminated the seafood supply chain with carcinogenic risk. The additive was deployed to prevent spontaneous combustion on vessels transporting fishmeal – a protein-rich byproduct used in aquaculture feed and livestock nutrition. The problem: the chemical persists in food systems, accumulating in farmed fish and animal feed sold to consumers.

The issue exposes a classic supply-chain failure. Maritime safety protocols created one problem to solve another without accounting for downstream contamination. Fishmeal producers, feed manufacturers, and seafood companies treated the additive as a contained operational fix. It wasn't. Chemical migration through integrated food systems means the risk flows from ship holds into supermarket aisles.

This matters because aquaculture now supplies over half of global seafood consumption. Farmed fish feed contains fishmeal. Livestock raised on contaminated feed enter human diets. The carcinogenic exposure is diffuse, which makes it harder to trace, harder to regulate, and easier for supply-chain actors to deny responsibility.

What's striking is the absence of pre-market screening. The additive was adopted because it solved an immediate, visible problem – ship fires – without toxicological due diligence across the full value chain. No one asked the right question: where does this chemical end up? Suppliers still use it. Regulators haven't banned it universally. Buyers don't demand alternatives.

This is supply-chain due diligence failure masquerading as operational efficiency. Until seafood companies and feed manufacturers map chemical inputs end-to-consumption, similar contamination risks will remain hidden in plain sight.