RiverFish

Rudd · Scardinius erythrophthalmus

Rudd in the River Thames

Largest measured rudd: 19 cm

The largest rudd measured in Environment Agency surveys of the River Thames was 19 cm, recorded at Northmoor- Pinkhill on 24 October 2007.

Across 37 measured rudd, the median measured length was 11 cm.

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

See rudd records across England →

Most recent observation25 July 2025Hambleden - Hurley (margin) · 3 fish
Largest measured rudd
19 cm
Median length
11 cm
Fish measured
37
Survey locations
15

Individual EA measurements

Largest measured rudd

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

LengthSurvey dateSurvey locationSurvey ID
19 cm24 Oct 2007Northmoor- Pinkhill108449
14.6 cm19 Jul 2023Iffley - Sandford (Margin)163981
14.6 cm15 Jul 2017Culham Weirpool151000
14.4 cm9 Jul 2024Iffley - Sandford (Margin)165892
14 cm29 Jul 2019Hambleden - Hurley (margin)155001
14 cm19 Jul 2012Iffley - Sandford (Margin)132635
13.5 cm25 Jul 2025Hambleden - Hurley (margin)178503
13.5 cm11 Jul 2024Abingdon - Culham (Margin)167254
13.5 cm26 Sept 2023Rushey to Shifford163917
13 cm25 Jul 2025Hambleden - Hurley (margin)178503

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

Explore the river

Where rudd were found

Each point marks a survey location with at least one rudd 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 rudd
Hambleden - Hurley (margin)29 Jul 201925 Jul 20252
Whitchurch to Mapledurham (Margin)10 Jul 201322 Jul 20253
Culham Weirpool15 Jul 201718 Jul 20252
Culham - Clifton Hampden (Margin)9 Jul 199718 Jul 20253
Days - Benson (Margin)10 Jul 199714 Jul 20242
Abingdon - Culham (Margin)21 Jul 202311 Jul 20242
Iffley - Sandford (Margin)19 Jul 20129 Jul 20243
Rushey to Shifford26 Sept 202326 Sept 20231
Sandford - Abingdon - (Margin)20 Jul 202320 Jul 20231
Cleeve-Goring - (Margin)23 Jul 202223 Jul 20221
Shiplake - Marsh (Weirpool)24 Jul 201124 Jul 20111
Northmoor- Pinkhill24 Oct 200724 Oct 20071
Culham - Clifton Hampden (Middle)8 Jul 20028 Jul 20021
Roundhouse to St Johns(mid-river)26 Jun 200226 Jun 20021
Clifton Hampden - Days (Margin)5 Jul 20005 Jul 20001

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

1997–2025

Survey records by year

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

Fish measured by surveyors

Measured length distribution

See how the 37 measured fish were spread across different length ranges.

Smallest
4.6 cm
Lower quarter
9.2 cm
Median
11 cm
Upper quarter
13 cm
Largest
19 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Thames

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

Roach Bleak Pike Chub Perch Dace

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 →