RiverFish

Dace · Leuciscus leuciscus

Dace in the River Wensum (central)

Largest measured dace: 32.4 cm

The largest dace measured in Environment Agency surveys of the River Wensum (central) was 32.4 cm, recorded at Swanton Morley on 19 July 1990.

Across 5,575 measured dace, the median measured length was 11.5 cm.

Surveyors recorded weights for 5 dace. The median was 0.7 oz (0.021 kg) and the largest recorded weight was 1.8 oz (0.05 kg).

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the River Wensum (central).

See dace records across England →

Most recent observation10 September 2025Swanton Morley · 24 fish
Largest measured dace
32.4 cm
Median length
11.5 cm
Fish measured
5,575
Survey locations
36

Individual EA measurements

Largest measured dace

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

LengthSurvey dateSurvey locationSurvey ID
32.4 cm19 Jul 1990Swanton Morley17254
27 cm28 Sept 2011U/s Billingford Rd Bridge128337
26.4 cm17 Jul 1990County School17252
26.2 cm6 Aug 2019Alders Spinney156039
26 cm18 Jun 1986County School17218
25.8 cm7 Aug 1990Downstream Attlebridge Bridge17261
25.8 cm7 Jul 1986Downstream Attlebridge Bridge17227
25.7 cm23 Sept 2003Swanton Morley77259
25.7 cm7 Aug 1990Downstream Attlebridge Bridge17261
25.7 cm19 Jul 1990Swanton Morley17254

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where dace were found

Each point marks a survey location with at least one dace record.

Choose a point on the map to see what was recorded there.

Map points are approximate and don’t show fishing access. Check local permissions before visiting.

Place surveyedFirst recordedLast recordedVisits finding dace
Swanton Morley23 Jun 198610 Sept 202521
Hellesdon Road (Albert's)4 Aug 198615 Aug 202522
Alders Spinney22 Jul 198614 Aug 202523
Downstream Elsing Mill23 Jun 19867 Aug 202524
Downstream Gt Ryburgh Bridge9 Jun 19861 Aug 202522
Sparham pool, Lyng26 Sept 20136 Sept 20246
Upstream Lenwade Mill1 Jul 198613 Aug 20249
Upstream Bintree Mill12 Jun 198623 Jul 202410
County School18 Jun 19864 Sept 201810
Pensthorpe Hall10 Jun 198620 Apr 20157
U/s Billingford Rd Bridge7 Sept 201028 Sept 20112
Blakes Meadow17 Jul 19869 Oct 20097
Upstream Drayton Green Lane30 Jul 19868 Oct 20097
Lyng Pits20 Jun 19861 Oct 20095
Downstream Ringland Bridge10 Jul 198630 Sept 20097
Upstream Gt Ryburgh5 Jun 198628 Sept 20096
Downstream Guist Bridge17 Jun 198624 Sept 20095
Attlebridge Hall Farm8 Jul 198623 Sept 20097
Downstream Billingford Bridge19 Jun 19864 Sept 200910
Walcis' Hill Meadow6 Oct 20036 Oct 20031
Downstream Attlebridge Bridge7 Jul 198622 Sept 20035
Fish Farm29 Aug 19908 Aug 19972
Heigham Waterworks14 Aug 19865 Aug 19972
Costessey Pits15 Jul 198624 Jul 19974
Pinewood23 Jul 198617 Jul 19974
Downstream Point Costessey28 Jul 19869 Jul 19974
Downstream Broken Bridges29 Jul 19868 Jul 19973
Swan Rescue24 Jul 19865 Jun 19974
Castle Farm13 Jun 199413 Jun 19941
Sennowe Park10 Jun 198625 May 19943
Upstream Costessey Mill16 Sept 198621 Aug 19902
Upstream Paddling Pool13 Aug 198613 Aug 19861
St Martins Close12 Aug 198612 Aug 19861
Edwards & Holmes Yard11 Aug 198611 Aug 19861
Upstream Taverham Mill14 Jul 198614 Jul 19861
Upstream Elsing Mill26 Jun 198626 Jun 19861

Choose a point or table row to see the location. More survey visits can mean more records, but not necessarily more fish.

1986–2025

Survey records by year

Each bar shows how many survey visits recorded dace that year.

Fish measured by surveyors

Measured length distribution

See how the 5,575 measured fish were spread across different length ranges.

Smallest
2.2 cm
Lower quarter
7.3 cm
Median
11.5 cm
Upper quarter
16.7 cm
Largest
32.4 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 5 dace. This is a subset of the measured fish and may not represent the whole population.

Lightest
0.1 oz (0.003 kg)
Lower quarter
0.3 oz (0.008 kg)
Median
0.7 oz (0.021 kg)
Upper quarter
0.9 oz (0.026 kg)
Heaviest
1.8 oz (0.05 kg)

These are direct individual weights recorded by Environment Agency surveyors. Combined bulk weights are not included.

More fish in this river

Explore the River Wensum (central)

Compare other species with enough survey and measurement data for a detailed page.

Pike Roach European eel Perch Gudgeon Chub

Before you fish

Good to know

These are past survey records, so the fish present today may be different. Map points are approximate—check local access, permissions and fishing rules before visiting.

Learn how RiverFish uses the data →