(Portland, OR) -- When you're eating Chinook salmon, shrimp, or other seafood you're likely also eating microplastics. Portland State University studied seafood caught from research vessels and sold in stores. They examined black rockfish, lingcod, Chinook salmon, Pacific herring, Pacific lamprey, and pink shrimp. They found 180 of 182 samples contained microplastics. Pink shrimp, that feed near the surface, had the highest concentrations. Microplastics can cause damage to DNA and gene development.