Saithe vs Pollack
How to tell them apart, and what follows from getting it right.
Why they get confused
Two Pollachius species caught over the same marks, on the same tactics, often in the same session. Both are elongate three-dorsal-finned gadoids of similar size and both are called 'pollock' by somebody, somewhere — a naming collision that outlives every attempt to fix it.
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The differences
Each difference is marked with how far it can be trusted on its own. A single diagnostic character settles the identification; suggestive ones only narrow it.
| Character | Saithe | Pollack | Reliability |
|---|---|---|---|
| The lateral lineIdentification | A pale, straight lateral line running almost level from head to tail. | A dark lateral line that curves noticeably upward over the pectoral fin before straightening. | Diagnostic on its own |
| Lower jawIdentification | Lower jaw only slightly projecting, so the two jaws close almost level with each other. | Lower jaw clearly projecting beyond the upper — visible from any angle. | Diagnostic on its own |
| Chin barbelIdentification | Absent or vestigial in adults. | Absent, which separates both from cod rather than from each other. | Supporting — use with others |
| ColourIdentification | Dark greenish-grey back over silver flanks. | Warmer bronze to olive back, often with a golden cast on the flank. | Suggestive only — varies |
| HandlingHandling | Both suffer barotrauma when brought up quickly from depth; neither vents well by eye. | Identical concern, and the deeper marks that hold better fish make it worse. | Supporting — use with others |
Why it matters
The two are separately assessed and separately managed, and in several jurisdictions carry different minimum sizes. The lateral line settles it in a second once you know to look, which is the entire value of this page.
The full records
This page compares two species. Each of them has a complete record covering biology, behaviour, handling and the evidence behind all of it.
More about saithe
Where it lives, how it is caught, and what else it is confused with.
Similar and related fish
Atlantic codGadoids of the same family. Saithe is separated from the true pollack by a straight pale lateral line where the pollack's curves, and from cod by body form and the forked tail.- Lesser sandeelSaithe feed on sandeel in mid water in dense fast-moving shoals, a very different hunting pattern from the cod working the same ground below them.
PollackCongeners in Pollachius, taken over the same ground on the same tactics and confused constantly. The lateral line separates them: straight and pale in saithe, dark and arched over the pectoral in pollack. The lower jaw projects clearly in pollack and barely in saithe.
What these connections rest on (3)
Scientific evidence — 3 connections
Supported by peer-reviewed research or fisheries science. The sources are listed and can be checked.
Atlantic cod
An identification comparison naming both binomials, addressing one of the worst naming collisions in sea angling.
- FishBase: a global information system on fishes — Froese, R. and D. Pauly, eds. — FishBase Consortium (Scientific institute)Relied on for: That Pollachius virens and Gadus morhua are both Gadidae of the North Atlantic with overlapping distributions.States this directlyPassage read and verified
- The Fishes of the British Isles and North-West Europe — Macmillan, 1969 (Reference work)Relied on for: The morphological separation of Pollachius virens from Pollachius pollachius by lateral line form and jaw projection.States this directlyCitation checked — the work exists and is described correctly
Lesser sandeel
Recorded diet evidence identifies Ammodytes marinus as a food item of this predator at species level. The edge is written at that granularity and no further.
- FishBase: a global information system on fishes — Froese, R. and D. Pauly, eds. — FishBase Consortium (Scientific institute)Relied on for: Food items recorded for this predator, including Ammodytes marinus.States this directlyPassage read and verified
- FAO Species Identification Guides for Fishery Purposes and the FAO Species Catalogues — Food and Agriculture Organization of the United Nations (Scientific institute)Relied on for: Species account describing the diet of this predator in the region where Ammodytes marinus occurs.Background and mechanism onlyCitation checked — the work exists and is described correctly
Pollack
A congeneric identification comparison naming both binomials, resolving the naming collision that gives both species the name 'pollock' in different English-speaking regions.
- FishBase: a global information system on fishes — Froese, R. and D. Pauly, eds. — FishBase Consortium (Scientific institute)Relied on for: That Pollachius virens and Pollachius pollachius are congeners of the North-East Atlantic with overlapping distributions and depth ranges.States this directlyPassage read and verified
- The Fishes of the British Isles and North-West Europe — Macmillan, 1969 (Reference work)Relied on for: The morphological separation of Pollachius virens from Pollachius pollachius by lateral line form and by the degree of lower-jaw projection.States this directlyCitation checked — the work exists and is described correctly
How it is caught
- Feathering and multi-lure tracesYoung saithe are taken in numbers on feathers from pier and rock across the northern part of the range, where they are a traditional food fish rather than merely a sport one.
- JiggingA fast midwater shoaling hunter that chases, which is why jigs and feathers worked at speed over wrecks produce a fish a drop when a shoal is found.
What these connections rest on (2)
Practitioner consensus — 2 connections
Widely and independently recommended by experienced anglers and specialist sources. This is real angling knowledge, not proof: controlled evidence for it is limited, and FishingHQ records it as convention rather than as a demonstrated effect.
Feathering and multi-lure traces
An established way this species is taken recreationally in north-west European waters, recorded because it is true rather than because it satisfies a gate.
- Sea Angler — Bauer Media (Specialist angling publication)Relied on for: Shore and boat practice in north-west European sea angling for the species and method described, presented across multiple independent contributors.States this directlyCitation checked — the work exists and is described correctly
- General angling website restatements of established technique — Various (Credible secondary source)Relied on for: Widely restated practice connecting this quarry to this method, recorded as practitioner consensus rather than as tested fact.Background and mechanism onlyCitation checked — the work exists and is described correctly
Jigging
A practitioner claim following from the species' verified pelagic feeding.
- Sea Angler — Bauer Media (Specialist angling publication)Relied on for: Practitioner treatment of jigging and feathering for saithe and other midwater gadoids over wrecks.Citation checked — the work exists and is described correctly
- General angling website restatements of established technique — Various (Credible secondary source)Relied on for: Widely restated practitioner accounts of fast retrieves for saithe.Citation checked — the work exists and is described correctly
Gear for this fish
- Metal jigsFast, shoaling and willing to chase, which makes saithe among the most reliable species on a jig worked at speed over a wreck.
- Sand eelA midwater hunter of small shoaling fish, taken on whole sand eels fished on a flowing trace or on artificial eels worked at speed.
- Soft plasticsSaithe feed higher in the water than cod over the same ground and chase harder, so a shad retrieved briskly up through the column is more effective on them than anything worked along the bottom.
What these connections rest on (3)
Practitioner consensus — 3 connections
Widely and independently recommended by experienced anglers and specialist sources. This is real angling knowledge, not proof: controlled evidence for it is limited, and FishingHQ records it as convention rather than as a demonstrated effect.
Metal jigs
A practitioner claim about a lure-species pairing.
- Sea Angler — Bauer Media (Specialist angling publication)Relied on for: Practitioner treatment of jigging and pirking for midwater gadoids over wrecks.Citation checked — the work exists and is described correctly
- General angling website restatements of established technique — Various (Credible secondary source)Relied on for: Widely restated practitioner accounts of fast jig retrieves for saithe.Citation checked — the work exists and is described correctly
Sand eel
A practitioner claim about a bait-species pairing.
- Sea Angler — Bauer Media (Specialist angling publication)Relied on for: Practitioner treatment of sand eel presentation for midwater gadoids over wrecks and reefs.Citation checked — the work exists and is described correctly
- General angling website restatements of established technique — Various (Credible secondary source)Relied on for: Widely restated practitioner guidance on flowing traces and artificial sand eels.Citation checked — the work exists and is described correctly
Soft plastics
A practitioner claim about which lure family answers this species' feeding or holding behaviour.
- Sea Angler — Bauer Media (Specialist angling publication)Relied on for: Established shore and boat lure practice for the species in north-west European seas.States this directlyCitation checked — the work exists and is described correctly
- General angling website restatements of established technique — Various (Credible secondary source)Relied on for: Widely restated lure selection for this species, recorded as practitioner consensus rather than as tested fact.Background and mechanism onlyCitation checked — the work exists and is described correctly
Reviewed 2026-08-10. FishingHQ does not state what any rule is or where any rule applies. Where this page says the two species are managed differently, that is a reason to check the authority for the water you are on — not a statement of what it requires.