Tenellia leopardina is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusc in the family Fionidae.[1]
This species was described from Marseille, France. In the original description it was also reported from the Rade de Villefranche-sur-Mer, Genoa, Italy, and near Trieste.
The typical adult size of this species is 10 mm.