Nembrotha kubaryana, also known as the variable neon slug or the dusky nembrotha, is a species of colorful sea slug, a dorid nudibranch, a marine gastropod mollusk in the family Polyceridae.

Yonow & Hayward (1991) treated the two names as synonyms and, acting as first revisers, gave precedence to kubaryana over nigerrima.

Pola et al. (2008) agreed with the synonymy, but initially rejected Yonow & Hayward's nomenclatural act, arguing that nigerrima had page precedence over kubaryana.

[3] Pola et al. reversed their conclusion and accepted Yonow's act as first reviser in a following paper later the same year.

[5] It stores the ascidian's toxins in its tissues and then releases them in a slimy defensive mucus when alarmed.