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

It seems to be endemic to the Hawaiian Islands.

[3] This nudibranch has a white body with a yellow-edged mantle border.

Its gills have white bases with black tips and the rhinophores have transparent bases and black clubs, with a thin electric-blue vertical line.

[3] It grows to 30 mm (1.2 in) in length.