Weigh 50 g of seafood sample into a blender. Obtain surface tissues, gills, and gut of fish. Shellfish samples include meat and liquor. Normally 12 animals are pooled, blended at high speed for 90 sec and 50 g of homogenate used for analysis. For crustaceans such as shrimp, use the entire animal if possible; if it is too large, select the central portion including gill and gut. Note: same for V. vulnificus