Rudd
Rudd are a native coarse fish found throughout the Netherlands in the slow, weedy waters that define so much of the Dutch lowland landscape. They're a staple of polder canals, ditches, and still backwaters — the kind of water you can reach on a bicycle.
Most anglers encounter them while float fishing for bream or roach, but rudd are also a key baitfish for pike in the polders, particularly in autumn and winter.
Scientific Name: Scardinius erythrophthalmus
Also known as Rietvoorn, Blankvoorn (informal, sometimes confused with roach)
- Deep, compressed body with brassy-yellow flanks, a dark greenish-brown back, and a whitish belly — noticeably more golden than roach.
- Bright red-orange pelvic, anal, and pectoral fins; the dorsal and tail fins are reddish-brown. The colour combination is distinctive in hand.
- Yellow or gold eyes (roach have a red spot above the pupil — the clearest ID feature when the two species are side by side).
- Upturned mouth set slightly above the eye line; dorsal fin sits noticeably further back than on roach. Typical fish run 15–25 cm; specimens above 35 cm are considered large in Dutch waters.
What to know
Habitat Distribution
- Native to the Netherlands and widespread across the lowland river system — found in the Rhine delta, Maas tributaries, and the polder network that covers much of the western and central provinces.
- Favour nutrient-rich, slow or still water with dense aquatic vegetation: polder ditches, canal margins, oxbow lakes, and the weedy backwaters of larger rivers.
- Present in waters like the Oude Maas (South Holland) and the Keesjes Killeke in Zeeland, as well as countless unnamed poldersloten (polder ditches) across the country.
- Tolerates slightly brackish conditions in the delta region, though they're most abundant in purely freshwater environments.
Key Locations
- Polder canal networks across Zuid-Holland and Utrecht — the dense system of ditches and house-lined canals holds rudd year-round and is accessible from most towns.
- Oude Maas (South Holland) — a tidal river arm in the Rhine-Maas delta where rudd are regularly caught alongside perch and zander.
- Keesjes Killeke (Zeeland) — a small public water in the southwest where rudd share the fishery with bream, roach, and tench.
- Meadow ditches (weilanden sloten) throughout the western lowlands — particularly productive for rudd in autumn when shoals move in from larger water.
Specific Spots
- Weed edges and lily-pad margins — rudd feed actively at the surface and just below it, so the transition between open water and emergent vegetation is the first place to look.
- Canal corners and bridge shadows in polder systems, where current is minimal and insects collect on the surface film.
- Shallow, weedy bays in lakes and backwaters, especially in warmer months when surface feeding is most visible.
- In autumn, rudd push into the meadow ditches alongside roach and perch; in winter they concentrate in the slightly warmer water of house-lined canals — the same movement that draws pike into Dutch streetside fishing spots.
Rudd FAQ
Answers from onWater's species guide.
What are the best lures and bait for Rudd?
Maggots and small redworms on a size 16–18 hook under a float are the most reliable bait, especially for consistent sport through a session. Bread punch or floating crust fished on the surface works well when fish are visibly rising, match the size of the bait to what the fish are taking.
What flies work for Rudd?
Small dry flies, Elk Hair Caddis (imitates adult caddisflies), CDC Dun (imitates emerging mayflies), or a simple Black Gnat (imitates small surface insects), all work when rudd are visibly rising.
When is the best time to fish for Rudd?
Spring (April–May): fish become active as water warms; pre-spawn shoals gather in shallow, weedy margins and feed heavily. Summer (June–August): peak surface feeding, especially early morning and evening; the most consistent dry-fly and float-fishing period.
How do you catch Rudd?
Most Dutch anglers encounter rudd while float fishing with maggots or bread from the bank of a polder canal or ditch. Fishing a waggler set shallow, 30 to 60 cm, with loose-fed maggots to draw the shoal up is the standard approach.
What do Rudd eat?
Primarily surface and mid-water feeders: insects, aquatic invertebrates, algae, and plant material. The upturned mouth is built for picking food off the surface film, watch for rising fish on calm evenings and match with a small dry fly or a floating crust.
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