Atlantic Wolffish
Atlantic wolffish turn up along Ireland's western and northern coasts as a genuine deepwater surprise — mostly caught by boat anglers working rough ground for cod and pollock. They're not a primary target, but any wolffish coming over the rail draws a crowd.
Their prehistoric appearance, crushing dentition, and cold-bottom habitat make them one of the more memorable species in Irish waters.
Scientific Name: Anarhichas lupus
Also known as Seawolf, Devil Fish, Atlantic Catfish, Sea Cat, Woof
- Elongated, eel-like body with a single long dorsal fin running almost the full length of the back; blueish-gray to brownish-green, with 10–15 dark vertical bars along the flanks.
- Large, rounded head with a prominent mouth carrying four to six fang-like front teeth and rows of crushing molars behind — unmistakable once seen.
- Most fish caught in Irish waters run 3–10 lb; specimens over 20 lb exist, and the species can reach 150 cm and over 50 lb at its upper limit.
What to know
Habitat Distribution
- Native to the North Atlantic; in European waters their range runs from Scandinavian and Barents Sea coasts south through the North Sea and around the British Isles, putting Ireland's western and northern coasts within their natural range.
- Bottom-dwelling fish of rocky, broken ground — reefs, ledges, and boulder fields from around 30 m down to 500 m, where they wedge into crevices and caves.
- Cold-water specialists: they produce a natural antifreeze that keeps their blood fluid at temperatures down to −1°C, so they're most consistently present in the deeper, colder water off Ireland's Atlantic-facing coast.
Key Locations
- The Wild Atlantic Way offshore banks — deep rocky ground off Donegal, Mayo, and Galway provides the cold, structured habitat wolffish need.
- Waters off Rockall and the northwest Atlantic shelf edge, where Irish vessels have recorded wolffish including rare spotted wolffish as bycatch.
- Deep reef marks off the north Donegal coast, where cold North Atlantic water and broken ground bring wolffish within reach of offshore boat anglers.
Specific Spots
- Rocky reef edges and broken ground in 40–200 m — wolffish use crevices and boulder piles as permanent lairs, so working the seabed close to structure is essential.
- Drop-offs where hard reef meets sand or mud: wolffish will move onto adjacent softer ground to feed on shellfish and urchins, then retreat to cover.
- Deep-water gullies and channels along the Wild Atlantic Way's offshore banks, where cold bottom currents concentrate the invertebrate prey they depend on.
Atlantic Wolffish FAQ
Answers from onWater's species guide.
What are the best lures and bait for Atlantic Wolffish?
Whole crab, squid, and large chunks of fish fished hard on the bottom are the most reliable baits, they match the shellfish and invertebrates wolffish naturally crush.
When is the best time to fish for Atlantic Wolffish?
Available year-round in suitable deepwater habitat, but most encounters come during summer and early autumn when offshore boat fishing is most active along the Wild Atlantic Way.
How do you catch Atlantic Wolffish?
Wolffish in Ireland are almost always caught by boat anglers targeting other deepwater species, cod, pollock, ling, over rough offshore ground. Fishing heavy bait rigs hard on the bottom over rocky reef marks gives the best chance of a deliberate encounter.
What do Atlantic Wolffish eat?
Primarily hard-shelled bottom invertebrates, crabs, lobsters, sea urchins, starfish, clams, and prawns, crushed with their powerful molar teeth. Heavy jigs and pirks worked slowly on the bottom imitate the slow-moving prey they hunt.
Where do Atlantic Wolffish live?
Native to the North Atlantic; in European waters their range runs from Scandinavian and Barents Sea coasts south through the North Sea and around the British Isles, putting Ireland's western and northern coasts within their natural range.
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