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Scientists Find Parasites in Almost Every Fish From a Recent Tuna Haul – 96% Were Infected

Researchers found 96% of 53 skipjack tuna carried worms, including parasites in muscle tissue that could affect seafood safety and market value.

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A study conducted in Brazil found parasites in 96 percent of the tuna examined. Scientists found more than 1,600 parasites in just 53 fish, some of which were also found in muscle tissue.

·Türkiye
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Brazilian scientists examined 53 tuna and found parasites in 96% of the fish, particularly in muscle tissue eaten in sushi and rolls.

Almost every tuna that came into the hands of scientists was infected with parasites - they were found in 96% of the fish. The findings also awaited researchers in the muscle tissue that humans eat.

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Science Alert broke the news in Canberra, Australia on Thursday, September 3, 2026.
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