The fish in Los Angeles, California’s sushi might actually be full of red herrings; that is, if you count the flounder passing for yellowfin in that spicy tuna roll. A new study has found that almost half the fish served at top sushi restaurants across Los Angeles was mislabeled, Yahoo! News reports. The study, published this week in Conservation Biology, ran DNA tests on 364 samples of 10 different fish from 26 restaurants over the course of 4 years. Of their sample, 47% was “fake,” meaning it was being labeled as something it wasn’t. For example, halibut, red snapper, and yellowfin tuna were almost always swapped out for an overexploited alternative like flounder. The researchers’ recommendation to avoid getting hoodwinked? Order salmon.