Sebastiscus is a genus of marine ray-finned fish belonging to the subfamily Sebastinae part of the family Scorpaenidae.

They are collectively called sea ruffes and resemble the rockfishes in the genus Sebastes, but are usually smaller and have a different pattern.

[4] There are currently four recognized species in this genus:[5][6] Sebastiscus was described by Jordan and Starks as being similar to the subgenus Sebastodes of the genus Sebastes, the Pacific rockfishes were considered to be separate from the Atlantic redfishes which bore the generic name Sebastes.

[7] Sebasticus species are found in the western Pacific Ocean from Japan and Korea south to the Philippines.

[5] Extralimital records of S. marmoratus in Australia and Norway are thought to probably be a result of fish being transported to these locations in the ballast water of ships.