RiverFish

Gudgeon · Gobio gobio

Gudgeon in the River Nar

Largest measured gudgeon: 14.8 cm

The largest gudgeon measured in Environment Agency surveys of the River Nar was 14.8 cm, recorded at Marham Intake on 24 March 1993.

Across 387 measured gudgeon, the median measured length was 8.4 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 Nar.

See gudgeon records across England →

Most recent observation1 April 2026Bone Mill · 2 fish
Largest measured gudgeon
14.8 cm
Median length
8.4 cm
Fish measured
387
Survey locations
14

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
14.8 cm24 Mar 1993Marham Intake30343
13.8 cm24 Mar 1993Marham Intake30343
13.5 cm20 Mar 2007DS Narborough Mill104820
13.2 cm14 Mar 2017DS Marham Sluice150300
13.1 cm1 Apr 2026Bone Mill181111
13.1 cm14 Mar 2017DS Marham Sluice150300
13.1 cm14 Mar 2017DS Marham Sluice150300
12.9 cm1 Apr 2026Bone Mill181111
12.8 cm12 Mar 2015Wormegay High Bridge144457
12.8 cm3 Apr 1996Nar Valley Fishery30361

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
Bone Mill1 Apr 20261 Apr 20261
Wormegay High Bridge8 Nov 198921 Mar 20176
Abbey Farm18 Mar 199320 Mar 20174
DS Marham Sluice14 Mar 201714 Mar 20171
White House Farm Kings Lynn1 Apr 20151 Apr 20151
Marham Intake24 Mar 199331 Mar 20154
Saddlebow18 Jan 199026 Mar 20155
Setchey11 Jan 199017 Mar 20156
High Bridge Side Channel17 Nov 198912 Mar 20155
DS Abbey Farm Weir (Eel Monitoring)18 Jul 201223 Jul 20142
US Sluice Kings Lynn12 Jan 199015 Apr 20103
DS Narborough Mill20 Mar 200720 Mar 20071
Nar Valley Fishery3 Apr 19963 Apr 19961
Narford Hall Estate17 Mar 199317 Mar 19931

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

1989–2026

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 387 measured fish were spread across different length ranges.

Smallest
3.4 cm
Lower quarter
7.3 cm
Median
8.4 cm
Upper quarter
9.8 cm
Largest
14.8 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Nar

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

European eel Bullhead 3-spined stickleback Brown / sea trout Pike 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 →