This database is produced by the Natl. Center for Biotechnology Information (NCBI) and can be accessed online at the NCBI website (http://www.ncbi.nlm.nih.gov). However, while GenBank is freely accessible and provides sequence information for many species, this database has been criticized for its susceptibility to misidentification of species or population, missing information, and inconsistent terminology. In recent years, several online resources have been developed for specific use in the field of DNA-based identification of fish and seafood species (Table 3). Examples of these databases are described in this section.