Jorunna funebris, commonly called the common slug , is a large species of sea slug. It is a dorid nudibranch, meaning it is a shell-less marine gastropod mollusk in the family Discodorididae. The genus Jorunna is composed of roughly 15 other species of nudibranchs, which feed on a variety of sponges.
This species was described from Sri Lanka. It is widespread in the Indo-Pacific region from the Red Sea and the Indian Ocean along the East African coast to Australia and New Caledonia. Jorunna funebris preys exclusively on sponge in the genus Xestospongia, and as such, the sea slug’s distribution aligns closely with the distribution of Xestospongia.
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]
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