Coalfish
Koolvis turn up along the Dutch North Sea coast, particularly where tidal currents concentrate baitfish near rocky structure and harbour walls.
They're a secondary target for sea anglers already fishing Zeeland beaches and coastal marks for bass and flatfish, but schools of smaller fish can provide fast action on light tackle.
Scientific Name: Pollachius virens
Also known as Koolvis, Coley, Saithe
- Dark greenish-brown back fading to bright silver-white on the belly — one of the more distinctively two-toned fish in the North Sea.
- Straight, pale lateral line (no kink over the pectoral fin) and roughly equal upper and lower jaw length — key features separating it from pollack, which has a pronounced underslung jaw.
- Three dorsal fins, two anal fins, and a shallowly forked tail; no chin barbel.
- Typical inshore fish run 30–60 cm; adults can reach 100–120 cm and over 20 kg, though large specimens are rare from the Dutch shore.
What to know
Habitat Distribution
- A native North Sea species — naturally present in Dutch coastal waters as part of its wider North Atlantic range.
- Juveniles move into shallow inshore areas in spring, making them accessible from beaches, piers, and harbour walls along the Zeeland and North Holland coasts.
- Adults push into deeper offshore water (down to 350 m) as they grow, so large fish are mainly a boat target.
- Gregarious and active in the water column — not a bottom-hugging species, but found anywhere from mid-water to near the surface when chasing prey.
Key Locations
- Zeeland — the delta coastline and tidal inlets give the best structural variety for shore-caught coalfish on the Dutch coast.
- Cadzand (Zwartepolderweg) — a beach mark in Zeeland noted by local sea anglers for its tidal variation and mixed-species potential.
- North Sea offshore grounds — larger adult coalfish are mainly a target for charter boats working deeper water off the Dutch coast.
Specific Spots
- Tidal races and current breaks around harbour walls and jetties concentrate the small baitfish that coalfish follow — fish the downtide edge of any structure.
- Rocky or mixed-ground areas hold more fish than flat sandy bottom; the Zeeland delta region has the most varied coastal structure on the Dutch coast.
- During incoming tides, coalfish push into shallower water to feed; on the ebb they tend to drop back into the deeper channel edges.
Coalfish FAQ
Answers from onWater's species guide.
What are the best lures and bait for Coalfish?
Feather rigs and sabiki-style multi-hook rigs are the go-to for schooling coalfish, they imitate a small group of baitfish and cover the water column efficiently. Metal pirks and slim silver spinners worked at speed through mid-water are effective, especially when fish are actively chasing sandeels near the surface.
When is the best time to fish for Coalfish?
Spring, juveniles move inshore as water warms, making this the prime window for shore fishing along the Dutch coast. Summer, fish remain accessible inshore, particularly around structure and tidal races in Zeeland. Autumn, fish begin moving offshore; boat fishing extends the season into deeper water.
How do you catch Coalfish?
Shore anglers in the Netherlands target coalfish from beaches and harbour walls in Zeeland and along the North Holland coast, typically using feather rigs or light lures cast into tidal current. Boat fishing on the offshore North Sea grounds is the more reliable route to larger fish.
What do Coalfish eat?
Primarily small fish, sandeels, sprats, and juvenile herring, plus shrimp and other crustaceans. This makes slim, silver lures and feather rigs the most direct imitation: they mimic a fleeing sandeel or sprat in the water column.
Where do Coalfish live?
A native North Sea species, naturally present in Dutch coastal waters as part of its wider North Atlantic range. Juveniles move into shallow inshore areas in spring, making them accessible from beaches, piers, and harbour walls along the Zeeland and North Holland coasts.
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