READ_ME_corrected_cnidarian_opsin_tree_Nov_7_2016 BMC is publishing an erratum for Lewis Ames et al. 2016. A new transcriptome and transcriptome profiling of adult and larval tissue in the box jellyfish Alatina alata: an emerging model for studying venom, vision and sex. BMC Genomics 17:650 DOI 10.1186/s12864-016-2944-3 After publication of our article, it was brought to our attention by a colleague that in describing the "7 transmembrane receptor (rhodopsin family)" G protein-coupled receptor (GPCR) transcripts of Alatina alata as "opsins" in Fig 11 and the results and discussion sections of the paper, we misrepresented the data, as Opsins are just one subfamily of rhodopsin family GPCRs. We regret that this important detail was overlooked prior to publication, and we apologize for any inconvenience caused by this error. The corrected gene tree reconstructions (.tre file) and corresponding alignment, limited to just opsins, are available here at: https://figshare.com/articles/Supplemental_Information_for_A_new_transcriptome_and_transcriptome_profiling_of_adult_and_larval_tissue_in_the_box_jellyfish_Alatina_alata_an_emerging_modelfor_studying_venom_vision_and_sex/3471425.