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

[2] This nudibranch was originally described from East Africa, but it has an Indo-West Pacific distribution including Australia (Queensland) and Hawaii.

It has a yellow body with an identifying red mantle margin which has two semi-permanent mantle folds about mid-body.

Identifying individual yellow sea slugs within the genus Diversidoris can be challenging because yellow forms exist in several related species.

[4][5] This species is often found on the yellow sponge Hyrtios, which appears to be its preferred food source.