Marioniopsis fulvicola Avila, Kelman, Kashman & Benahayu, 1999 Marionia levis is a species of dendronotid nudibranch.

It is a marine gastropod mollusc in the family Tritoniidae and is found in shallow water in the Red Sea and Indian Ocean.

This was almost identical in appearance to Eliot's species but there were differences in its internal anatomy, in particular in the structure of the radula and the number of gizzard plates (150 v. 30).

[4] Marionia levis is found in shallow water in the Indian Ocean, its range extending from Tanzania, Kenya and the Red Sea to the Comoro Islands.

[5] The nudibranch is well-camouflaged when on the surface of its prey as it is similar in colour, and the gill clusters resemble the polyps of the soft coral.