The Penaeidae comprises 26 genera and approximately 200 species as most of Penaeidae shrimps in the same genus are morphologically similar, and just exhibited subtle morphological differences, which makes identification of Penaeidae shrimps a difficult task based on taxonomic keys alone. In order to define the practicability of DNA barcoding in identification of Penaeidae shrimps, in this study, we used COⅠ gene to examine 32 kinds of Penaeidaes' nucleotide composition, interspecific genetic distance and in...