Micro-CT was performed to the anterior end of a polychaete (Alitta succinea). This scan was performed for the visualization of the everted pharynx of the specimen (http://zookeys.pensoft.net/articles.php?id=3650). Specimen was provided by Katerina Vasileiadou and scanned by Sarah Faulwetter. The original dataset is available in https://datadryad.org/resource/doi:10.5061/dryad.84m54.