Spatio-temporal expression patterns of anterior Hox genes during Nile tilapia (Oreochromis niloticus) embryonic development

► Nile tilapia Hox PG3-6 genes are expressed in the pharyngeal arches and neural tube. ► Several of these genes show divergent expression to orthologs of other teleosts. ► Divergent Hox expression may result in divergent PJA morphologies in teleosts.