Flounder
What the research shows
Not enough
published research on this page yet
A type of flat fish found in oceans.1
What research says
Found in some samples or products
These come from where it was grown, how it was processed or cooked, or what it was made into. They are not about the ingredient itself, so the signal does not count them.
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Food poisoning from raw fish2
Eating raw flounder can cause vomiting and diarrhea when the fish carries a parasite called Kudoa septempunctata.
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Food poisoning from fish3
In Korea, months with more olive flounder shipped did not line up with more reported Kudoa food poisoning cases.
The signal at the top counts the findings in people and in animal and lab studies. A concern in studies of people outranks animal and lab studies, and “No concerns” needs at least one finding in people. When most findings in people point one way, the page leans that way (“Mostly”), and every finding is still shown. Findings whose study type is not stated are shown but not counted. This page is a reference, not medical advice. It describes what regulators and published research say. Talk to a doctor or dietitian about your own diet.
Products
The 3 most-scanned of 52 products on Open Food Facts that list flounder.
- Flounder Kroger 1 additive
- Garlic & herb flounder 3 additives
- Flounder Fish Fillets Gorton's · 111 g 10 additives
References
- 1Flounder. Wikipedia. Accessed September 30, 2026. CC BY-SA 4.0.
- 2Yokoyama H, Funaguma N, Kobayashi S. In Vitro Inactivation of Kudoa septempunctata Spores Infecting the Muscle of Olive Flounder Paralichthys olivaceus. Foodborne Pathog Dis. 2016;13(1):21-7. doi:10.1089/fpd.2015.2003
- 3Bae JM. Relationship between shipping amounts of olive flounder aquacultured from Jejudo and the reported events of acute food poisoning by Kudoa septempunctata in 2015, South Korea: an ecological study. Epidemiol Health. 2017;39:e2017041. doi:10.4178/epih.e2017041