The fourhorn sculpin is easily identified by the four large, bony protuberances
on the top of its head. Otherwise, it has a body plan similar to that of most
sculpins a broad, spiny head, large pectoral fins and reduced pelvic fins.
Its body colouring is a uniform light yellow on the underside, changing to a brown
on the sides, and finally to dark brown on the dorsal surface. Adults reach an
average size of 25 cm.
This fish inhabits Hudson Bay, the coasts of Labrador, Greenland, the White Sea,
and parts of the Baltic Sea, where it is regarded as a relict of the last Ice