- Kingdom: Animalia
- Phylum: Chordata
- Subphylum: Vertebrata
- Superclass: Gnathostomata
- Class: Actinopterygii
- Order: Perciformes
- Family: Anarhichadidae
- Scientific name: Anarhichas lupus
- Norwegian: gråsteinbit, steinbit
Typical for the Atlantic wolffish is the grey skin color with darker transversal stripes along the body. Young specimens often have a brown tint. Like the other wolffishes, it has one long dorsal fin along the entire body length. The Atlantic wolfish may reach 20 kg and a length of 120 cm
The Atlantic wolffish thrives on rocky bottoms as well as sandy or muddy substrate. It has been registered on all depths from 1 to 1000 meters.
It has a North-Atlantic distribution, ranging from western Greenland to the North Sea and the British Isles.