Thordisa filix

{{Short description|Species of gastropod}}

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| image = Thordisa filix Pruvot-Fol, 1951.jpg

| image_caption = Thordisa filix

| taxon = Thordisa filix

| authority = Pruvot-Fol, 1951Pruvot-Fol A. (1951). Etudes des nudibranches de la Méditerranée 2. Archives de Zoologie Expérimentale et Générale 88: 1-80

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Thordisa filix is a species of sea slug, a dorid nudibranch, shell-less marine opisthobranch gastropod molluscs in the family Discodorididae.Gofas, S. (2004). [http://www.marinespecies.org/aphia.php?p=taxdetails&id=139591 Thordisa filix Pruvot-Fol, 1951.] In: MolluscaBase (2016). Accessed through: World Register of Marine Species on 2016-05-12.