Jorunna funebris, commonly called the dotted nudibranch, is a large species of sea slug.

This species contains a chemical compound called "jorumycin," which shares the same tetrahydroisoquinoline[7] backbone as an anti-tumor drug called Zalypsis, or PM00104.[8] In addition, another compound called jorunnamycin A,[9] has been found alongside fennebricins A (1) and B (5), both of which are bis-tetrahydroisoquinolinequinones and related to two classes of anti-tumor alkaloids.[10]