Thorunna daniellae is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusc in the family Chromodorididae.

[2][3] Hawaiian islands, Midway, and Kure; widely distributed in the Indo-Pacific.

This species is opaque white with a magenta line encircling the notum just inside the mantle margin.

The gills are opaque white with orange-red tips.

In very young animals, the notum is translucent and has a herringbone pattern of embedded white spicules beginning between the rhinophores and ending at the gills.