Sebastiscus marmoratus, the sea ruffe, false kelpfish or dusky stingfish, is a species of marine ray-finned fish belonging to the subfamily Sebastinae, the rockfishes, part of the family Scorpaenidae.

[2] When David Starr Jordan and Edwin Chapin Starks described the genus Sebastiscus designated S. marmoratus as the type species.

There is a series of dark blotches or saddles along the back, there is white spotting scattered on the lower flank but any above the lateral line are indistinct.

These records are thought to probably be a result of fish being transported to these locations in the ballast water of ships.

[6][7] This is a demersal fish, found over rocky substrates near to the shore in seaweed beds in lagoons and seaward reefs.