RiverFish

Chub · Leuciscus cephalus

Chub in the River Wensum (central)

Largest measured chub: 56 cm

The largest chub measured in Environment Agency surveys of the River Wensum (central) was 56 cm, recorded at Downstream Elsing Mill on 7 August 2025.

Across 4,169 measured chub, the median measured length was 29.5 cm.

Surveyors recorded weights for 4 chub. The median was 2 lb 11.8 oz (1.24 kg) and the largest recorded weight was 5 lb 12 oz (2.61 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 chub records across England →

Most recent observation10 September 2025Swanton Morley · 13 fish
Largest measured chub
56 cm
Median length
29.5 cm
Fish measured
4,169
Survey locations
32

Individual EA measurements

Largest measured chub

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

LengthSurvey dateSurvey locationSurvey ID
56 cm7 Aug 2025Downstream Elsing Mill177856
55.5 cm9 Sept 2014Downstream Elsing Mill142756
55.2 cm9 Sept 2014Downstream Elsing Mill142756
55.2 cm9 Sept 2014Downstream Elsing Mill142756
55.1 cm26 Sept 2006Downstream Elsing Mill101924
54.6 cm6 Aug 2019Alders Spinney156039
54.5 cm7 Aug 2014Alders Spinney142779
54.4 cm2 Oct 2009Swanton Morley119284
54.3 cm9 Sept 2014Downstream Elsing Mill142756
54.2 cm1 Aug 2024Downstream Elsing Mill166222

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

Explore the river

Where chub were found

Each point marks a survey location with at least one chub 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 chub
Swanton Morley23 Jun 198610 Sept 202521
Hellesdon Road (Albert's)4 Aug 199715 Aug 202522
Alders Spinney22 Jul 198614 Aug 202523
Downstream Elsing Mill23 Jun 19867 Aug 202524
Sparham pool, Lyng26 Sept 20136 Sept 20246
County School18 Jun 198620 Aug 20249
Upstream Lenwade Mill1 Jul 198613 Aug 202411
Downstream Gt Ryburgh Bridge9 Sept 200829 Sept 20237
U/s Billingford Rd Bridge7 Sept 201028 Sept 20112
Blakes Meadow17 Jul 19869 Oct 20096
Upstream Drayton Green Lane30 Jul 19868 Oct 20097
Lyng Pits27 Jul 19901 Oct 20094
Downstream Ringland Bridge10 Jul 198630 Sept 20096
Attlebridge Hall Farm8 Jul 198623 Sept 20097
Downstream Billingford Bridge19 Jun 19864 Sept 200912
Upstream Bintree Mill13 Sept 200613 Sept 20061
Upstream Gt Ryburgh9 Oct 200311 Sept 20062
Pensthorpe Hall6 Sept 20066 Sept 20061
Walcis' Hill Meadow6 Oct 20036 Oct 20031
Downstream Attlebridge Bridge7 Jul 198622 Sept 20035
Heigham Waterworks14 Aug 19865 Aug 19972
Costessey Pits15 Jul 198624 Jul 19974
Pinewood23 Jul 198617 Jul 19974
Downstream Point Costessey28 Jul 19869 Jul 19974
Walcis Farm30 Jul 19906 Jun 19972
Swan Rescue24 Jul 19865 Jun 19974
Castle Farm25 Jun 19867 May 19973
Downstream Broken Bridges29 Jul 19868 Aug 19943
Fish Farm1 Aug 198629 Aug 19902
Upstream Costessey Mill16 Sept 198621 Aug 19902
Upstream Elsing Mill26 Jun 198624 Jul 19902
Edwards & Holmes Yard11 Aug 198611 Aug 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 chub that year.

Fish measured by surveyors

Measured length distribution

See how the 4,169 measured fish were spread across different length ranges.

Smallest
2 cm
Lower quarter
15.4 cm
Median
29.5 cm
Upper quarter
44 cm
Largest
56 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 4 chub. This is a subset of the measured fish and may not represent the whole population.

Lightest
1 lb 9.2 oz (0.713 kg)
Lower quarter
1 lb 14.2 oz (0.8562 kg)
Median
2 lb 11.8 oz (1.24 kg)
Upper quarter
4 lb 0.8 oz (1.84 kg)
Heaviest
5 lb 12 oz (2.61 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 Dace Roach European eel Perch Gudgeon

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 →