Links to Ensembl gene records are established through automated data exchange between ZFIN and the Ensembl project. Ensembl gene identifiers are only included for ZFIN genes that are associated with a unique Ensembl gene record. Ensembl provides automated genome annotation and subsequent visualization of the genome. Details of this process are available here. Ensembl/Sanger associates these genes with cDNAs that match at least 90% of the identity of Ensembl gene. Association between the cDNAs and ZFIN genes are used to create links between Ensembl and ZFIN. To obtain more detailed information about this process or to send comments, please contact ZFIN zfinadmn@zfin.org.