Gudgeon · Gobio gobio

Gudgeon in the Bristol Avon main river

Largest measured gudgeon: 16 cm

The largest gudgeon measured in Environment Agency surveys of the Bristol Avon main river was 16 cm, recorded at Lacock (Te) on 27 August 2013.

Across 1,581 measured gudgeon, the median measured length was 10 cm.

Surveyors recorded weights for 516 gudgeon. The median was 0.5 oz (0.014 kg) and the largest recorded weight was 2 oz (0.057 kg).

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

See gudgeon records across England →

Most recent observation3 September 2024Chippenham (Te) · 6 fish

Largest measured gudgeon: 16 cm
Median length: 10 cm
Fish measured: 1,581
Survey locations: 7

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
16 cm	27 Aug 2013	Lacock (Te)	138284
15.2 cm	13 Oct 2009	Chippenham (Te)	119320
15 cm	5 Jul 2006	Great Somerford (Te)	99929
14.9 cm	9 Sept 2014	Lacock (Te)	142610
14.8 cm	9 Sept 2014	Lacock (Te)	142610
14.7 cm	11 Sept 2013	Chippenham (Te)	138684
14.6 cm	26 Aug 2009	Lacock (Te)	118550
14.5 cm	26 Aug 2009	Lacock (Te)	118550
14.4 cm	28 Jul 2010	Lacock (Te)	123161
14.3 cm	11 Sept 2013	Chippenham (Te)	138684

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
Chippenham (Te)	9 Sept 2003	3 Sept 2024	14
Christian Malford (Te)	19 May 1999	23 Aug 2023	10
Great Somerford (Te)	28 Aug 2002	22 Aug 2023	14
Lacock (Te)	20 Aug 2003	21 Aug 2019	13
Melksham	16 Sept 2015	30 Aug 2017	3
Barton Country Park	18 Sept 2014	18 Sept 2014	1
Rawlings Farm (Te)	23 Jul 2003	12 Jul 2006	4

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

1999–2024

Survey records by year

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

199

000

001

102

503

504

505

406

107

008

409

310

411

012

413

514

315

516

417

018

219

020

021

022

223

124

Fish measured by surveyors

Measured length distribution

See how the 1,581 measured fish were spread across different length ranges.

Smallest: 2.7 cm
Lower quarter: 8.6 cm
Median: 10 cm
Upper quarter: 11.2 cm
Largest: 16 cm

0–99 mm

738

100–199 mm

843

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 516 gudgeon. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0 oz (0.001 kg)
Lower quarter: 0.4 oz (0.01 kg)
Median: 0.5 oz (0.014 kg)
Upper quarter: 0.6 oz (0.018 kg)
Heaviest: 2 oz (0.057 kg)

These are direct individual weights recorded by Environment Agency surveyors. Combined bulk weights are not included.

More fish in this river

Explore the Bristol Avon main river

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

Roach Minnow Perch Chub Dace Pike

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 →