Gudgeon · Gobio gobio

Gudgeon in the River Ock

Largest measured gudgeon: 13.3 cm

The largest gudgeon measured in Environment Agency surveys of the River Ock was 13.3 cm, recorded at Marcham Mill - Mill bridge/Nor brook on 27 May 2005.

Across 148 measured gudgeon, the median measured length was 9.7 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 Ock.

See gudgeon records across England →

Most recent observation15 May 2014Millets Farm · 4 fish

Largest measured gudgeon: 13.3 cm
Median length: 9.7 cm
Fish measured: 148
Survey locations: 5

Individual EA measurements

Largest measured gudgeon

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

Length	Survey date	Survey location	Survey ID
13.3 cm	27 May 2005	Marcham Mill - Mill bridge/Nor brook	86326
12.8 cm	27 May 2005	Marcham Mill - Mill bridge/Nor brook	86326
12.8 cm	19 Apr 2005	d/s drayton road bridge - North channel	84462
12.6 cm	4 May 2005	Millets Farm	86323
12.4 cm	27 May 2005	Marcham Mill - Mill bridge/Nor brook	86326
12.4 cm	4 May 2005	Millets Farm	86323
12.3 cm	15 May 2014	Millets Farm	140799
12.2 cm	27 May 2005	Marcham Mill - Mill bridge/Nor brook	86326
12.2 cm	4 May 2005	Millets Farm	86323
12.2 cm	4 May 2005	Millets Farm	86323

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 surveyed	First recorded	Last recorded	Visits finding gudgeon
Millets Farm	4 May 2005	15 May 2014	2
Marcham Mill - Mill bridge/Nor brook	27 May 2005	27 May 2005	1
U/s Marcham Mill	16 May 2005	16 May 2005	1
d/s drayton road bridge - North channel	19 Apr 2005	19 Apr 2005	1
d/s Drayton road bridge - South Channel	19 Apr 2005	19 Apr 2005	1

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

2005–2014

Survey records by year

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

505

006

007

008

009

010

011

012

013

114

Fish measured by surveyors

Measured length distribution

See how the 148 measured fish were spread across different length ranges.

Smallest: 5 cm
Lower quarter: 8.5 cm
Median: 9.7 cm
Upper quarter: 11.3 cm
Largest: 13.3 cm

0–99 mm

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Ock

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

Pike Roach Chub Perch Brown / sea trout 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 →