RiverFish

Gudgeon · Gobio gobio

Gudgeon in the River Upper Ouse

Largest measured gudgeon: 18.5 cm

The largest gudgeon measured in Environment Agency surveys of the River Upper Ouse was 18.5 cm, recorded at Brackley on 5 September 2016.

Across 4,976 measured gudgeon, the median measured length was 10.3 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 Upper Ouse.

See gudgeon records across England →

Most recent observation21 April 2026DS Wolverton Mill · 3 fish
Largest measured gudgeon
18.5 cm
Median length
10.3 cm
Fish measured
4,976
Survey locations
41

Individual EA measurements

Largest measured gudgeon

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

LengthSurvey dateSurvey locationSurvey ID
18.5 cm5 Sept 2016Brackley149158
16.3 cm10 Oct 2017Brackley151912
16.3 cm21 Jun 1988Water Stratford28814
15.3 cm28 Jun 1988US Mill Farm28820
15.3 cm28 Jun 1988US Mill Farm28820
15.3 cm21 Jun 1988Westbury28813
15.3 cm21 Jun 1988Westbury28813
15.3 cm21 Jun 1988Westbury28813
15.1 cm5 Sept 2016Brackley149158
15.1 cm6 Aug 2013Manor Farm Cosgrove137725

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

Explore the river

Where gudgeon were found

Each point marks a survey location with at least one gudgeon 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 gudgeon
DS Wolverton Mill20 Aug 201321 Apr 20264
Passenham14 Jul 198812 Jun 202515
Thornborough Mill23 Jul 199119 Jun 202414
Buckingham23 Jun 198818 Jun 202414
Kempston Mill6 Mar 199231 Aug 20235
Oakley23 Nov 198830 Aug 202316
Odell21 Nov 198823 Aug 202313
Turvey18 Nov 198822 Aug 202316
Clifton Reynes16 Nov 198816 Aug 202316
DS Ravenstone Mill1 Sept 201115 Aug 20233
Stony Stratford Bypass Channel30 Jun 20168 Oct 20193
Mill Farm Gayhurst2 Aug 198819 Aug 201913
Brackley30 Sept 200810 Oct 20173
Newport Pagnell15 Nov 19884 Sept 201715
Manor Farm Cosgrove8 Jul 198831 Oct 20168
Mill Farm30 Jun 198811 Oct 20169
Water Stratford21 Jun 19888 Sept 20167
Westbury21 Jun 19887 Sept 20167
Mount Mill Farm9 Aug 19885 Aug 201312
Old Stratford27 Jun 198830 Jul 20133
Lavendon Mill13 Oct 19882 Sept 20112
Ravenstone Mill1 Nov 19885 Aug 20109
Radwell / Bletsoe20 Oct 19884 Aug 20107
DS Passenham Weir15 Jul 198817 Apr 20086
Wolverton Mill25 Apr 199421 Jul 20065
Milton Ernest STW7 Sept 20047 Sept 20041
Stoke Mill Sharnbrook3 Sept 20043 Sept 20041
Pavenham11 Nov 19882 Sept 20044
Stony Stratford1 Nov 20011 Nov 20011
Biddenham29 Nov 198817 Nov 19972
Harrold Country Park14 Nov 198814 Nov 19974
Sherrington26 Oct 198823 Oct 19974
Felmersham19 Oct 198820 Oct 19973
Newton Blossomville17 Oct 19888 Oct 19973
Radclive Mill27 Mar 199130 Apr 19973
US Mill Farm28 Jun 198817 Apr 19974
Old Mill House Buckingham24 Jun 198814 Apr 19973
Clapham3 Mar 199228 Oct 19942
Milton Ernest22 Nov 198819 Oct 19943
Emberton Park24 Nov 198810 Oct 19943
Carlton18 Oct 198818 Oct 19881

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

1988–2026

Survey records by year

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

Fish measured by surveyors

Measured length distribution

See how the 4,976 measured fish were spread across different length ranges.

Smallest
3.3 cm
Lower quarter
9.2 cm
Median
10.3 cm
Upper quarter
11.3 cm
Largest
18.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Upper Ouse

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

Pike Perch Dace Roach Chub Common bream

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 →