So claims a now-viral Instagram post that was shared in March 2021 by the Smithsonian Institute in appreciation of #ParasiteWeek2021. And if the photo was enough to give you the heebie-jeebies, then you may not want to continue reading. Because both the photograph in question and the supposed parasite featured in it are, in fact, real. The picture featured an organism known as a cymothoid isopod and was originally shared on Aug. 3, 2020, by marine biologist Jimmy Bernot, a post-doctoral scholar with the National Science Foundation and Smithsonian’s National Museum of Natural History specializing in crustacean phylogeny and parasite evolution. In an email to Snopes, Bernot said that he captured the photo during a 2016 survey of fish parasites of Moreton Bay, Australia.