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

[2] It was transferred to the genus Ardeadoris on the basis of DNA evidence.

It occurs in the tropical Indo-West Pacific regions, with confirmed sightings from the Philippines, Thailand, Guam, Hawaii and the Marshall Islands.

The mantle border ranges in colour from opaque white to orange-yellow.

The midline of the body has a more opaque line that runs from the rhinophores to the posterior branchia (gills).