Kayak Fishing Adventures on Big Water’s Edge - The Yummy Patagonian Toothfish

The (Newest) Trouble With Chilean Sea Bass

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Photo credit: Andrew Scrivani/StockFood

Trouble seems to follow the Chilean sea bass, a prehistoric-looking, toothy beast that lives in the chilly waters off the coast of Antarctica and nearby countries.
In the early 1990s, Chilean sea bass—or Patagonian toothfish, as it was originally called—experienced an unexpected popularity boom.It went from being “uncool,” mostly seen in frozen, deep-fried fish sticks, to being a major player in haute cuisine. Its fishy cameos included buzzy New York City restaurants such as Tribeca Grill, which is co-owned by actor Robert De Niro.

And with its rising star came legions of illegal fishing operations looking to cash in on its success. In 2000, approved fisheries caught more than 16,000 tons of Chilean sea bass. But the National Oceanic and Atmospheric Administration estimates that as many as twice that amount were caught illegally, which has led to troubling overfishing in some areas.
This week Chilean sea bass finds itself back in the news, as the subject of a worrisome new study from the University of Hawaii. Seafood fraud—the substitution of a lesser-valued fish for a more expensive one—is already a known problem, but associate biology professor Peter Marko wondered if the issue unwittingly exposed consumers to higher-than-expected levels of mercury. Using the Chilean sea bass to test his theory, Marko found that fish substitutions “obscure a complex pattern of mercury contamination.”
After DNA-testing Chilean sea bass samples from retail seafood counters across 10 states, Marko found that nearly a quarter of fish given the stamp of approval from the Marine Stewardship Council, a leading authority on seafood sustainability, did not originate from their designated fisheries, but rather from unknown areas where mercury contamination is more likely. MSC-certified Chilean sea bass, in particular, was found to have mercury levels up to three times higher than expected (more than several countries’ import limits).
Yikes! “Although on average MSC-certified fish is a healthier option than uncertified fish, with respect to mercury contamination, our study shows that fishery-stock substitutions can result in a larger proportional increase in mercury,” Marko concluded in a press release.
Timothy Hansen, director of NOAA’s seafood inspection program, assured us that it’s unlikely anyone would get mercury poisoning from eating any sort of Chilean sea bass.
"You just have to eat a lot of these kinds of fish for a long time to get [mercury levels that are] up there," he told us. "I think it’s very unlikely."
At the very least, however, it’s advisable to know what you’re eating, and that’s harder when MSC certification labels aren’t as trustworthy as they seem. MSC did not return our calls as we went to press.