Cadlina luteomarginata, common name the yellow-edged cadlina, is a species of colorful sea slug, a dorid nudibranch, a shell-less marine gastropod mollusk in the family Cadlinidae.

[1] This dorid nudibranch lives in the eastern Pacific from Alaska to Mexico.

Reports of this species from the eastern coast of North America, need to be investigated.

It shows near the rear end a ring of six yellow-tipped feathery gills and rhinophores.

Their subepithelial glands are compound and consist of large vacuoles with bluish stained content.