‘Widespread’ seafood mislabelling at retailers, restaurants

When consumers buy butterfish or white tuna at a grocery store they may instead receive a fish dubbed “the laxative of the sea” because escolar can cause diarrhoea, vomiting and other stomach problems.

Nearly half of seafood samples tested at Canadian grocery stores and restaurants is wrongly labelled, according to an investigation into seafood fraud that claims such practices can harm consumer health and wallets, as well as hurt the environment.

“The results show widespread mislabelling,” said Julia Levin, seafood fraud campaigner for advocacy group Oceana Canada, which conducted the study.

It collected 382 samples of snapper, sea bass, sole and other fish that other studies indicate are often substituted. They chose samples from 177 retailers and restaurants in five Canadian cities.

Scientists at laboratories at TRU-ID, a Guelph, Ont.-based lab, used DNA barcoding to determine the species of fish. That was compared to the Canadian Food Inspection Agency’s Fish List, which contains acceptable market names for various fish species.

They found 44 per cent of the fish were not what the label claimed.

Snapper, yellowtail and butterfish were mislabelled 100 per cent of the time, according to the study. Half of the seabass samples were wrongly identified, while more than 30 per cent of cod, halibut, tuna and sole samples were mislabelled. Most often the fish turned out to be escolar, tilapia or Japanese amberjack.

The samples were mislabelled in restaurants 52 per cent of the time and 22 per cent of the time at retailers, including grocery stores and markets.

The CFIA, which is responsible for mitigating food safety risks and monitors food fraud in the country, did not immediately respond to a request for comment.

Previous studies have shown similar results.

It’s been a problem in the industry “forever,” said Hana Nelson, a fishmonger with Halifax-based Afishionado, who was briefed on the study’s results before they were made public.

She wants to believe the issue isn’t people acting maliciously, but rather mostly accidental.

“I’m not so pessimistic to think that a lot of people are doing it on purpose,” she said. “I think it’s just the nature of the supply chain. It’s really, it’s allowed for that lack of transparency.”

Seafood is susceptible to food fraud because of a complicated global supply chain that has opportunities for mislabelling at many stages from the fishing boat to the restaurant or store.