Salvelinus inframundus, also known as Orkney charr is a cold-water fish in the family Salmonidae which is endemic to Scotland.

Salvelinus inframundus has the following characteristics which in combination make this taxon different from other "Arctic charr" in Great Britain.

[2] Other distinguishing features cited include a blunt snout; steel-grey colour on the sides with a white to pinkish or bright orange belly; there are numerous whitish spots along the flanks, mostly on the upper half of body.

[1] Salevlinus inframundus was first formally described by the English ichthyologist Charles Tate Regan (1878–1943) in 1909 with the type locality given as Hellyal Lake, the former name of Heldale Water on the Isle of Hoy in Orkney.

[5] There is some controversy over the exact taxonomic status of the populations of charr which are found in lakes all over Europe and which show disjunct distributions and wide phenotypic variations.