Pleurobranchus varians is a species of sea slug, a sidegill slug, a marine gastropod mollusc in the family Pleurobranchidae.
The sister species (the closest relative) is Pleurobranchus areolatus from Caribbean. Those two species split 3.10 million years ago (Isthmus of Panama formed 3.1âÂÂ3.4 Mya). Both species have color morphs and for their proper determination is useful the knowledge of locality.
The distribution of P. varians include the Hawaiian Islands and Vanuatu. The type locality is Hawaiian Islands.
P. varians was originally discovered and described by William Harper Pease in 1860. Pease' original text (the type description) reads as follow:
All species in the genus Pleurobranchus are carnivorous.
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