Phestilla sibogae is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusk in the family Trinchesiidae.

[2] The species feeds on the hard coral genus Porites.

[3] This species was described from Indonesia.

[1] It was previously treated as a synonym of Phestilla lugubris but is now considered distinct due to differences in larval development and adult morphology to be a distinct species.

[4]