DNA barcodes is very useful in the control of the goods , and deli and DNA barcodes has been proven to be particularly effective in the traceability of food. And authentication of meat products . The species correctly. Crab species used to produce the industry's diverse and varied off. If a species does not meet the actual material . Nutrition was too different and / or some species may be antigen. Causing harm to consumers. Trade in determining the correct label . It protects the rights of consumers. Encourage fair competition among operators.