Seafood lovers, are you getting “catfished” at the dinner table?

It’s very possible. One in five seafood samples tested worldwide turns out to be completely different from what the menu or packaging says, according to a report on seafood fraud released Wednesday by the ocean conservation group Oceana. Of the more than 25,000 seafood samples the group analyzed, 20 percent were incorrectly labeled.

“It is likely that the average consumer has eaten mislabeled fish for sure,” said Beth Lowell, the senior campaign director for Oceana and an author of the paper. “You’re getting ripped off, while you enjoyed your meal you’re paying a high price for a low fish.”

The biggest impostor, fittingly, was farmed Asian catfish, a fish with white flesh that is easily disguised when it’s filleted and drenched in sauce. It was sold in place of 18 types of more expensive fish, including perch, cod and grouper.