Tyrannodoris leonisTyrannodoris leonis is a species of sea slug, a polycerid nudibranch, a marine gastropod mollusc in the family Polyceridae.DistributionThis species was described from the Galapagos Islands. It is also found in the Eastern Pacific Ocean, from Costa Rica to the Gulf of California.DescriptionTyrannodoris leonis reaches approximately 30 mm in length. Like other nudibranchs in the genus Tyrannodoris, it is carnivorous, feeding on other seaslugs.