Gudgeon · Gobio gobio

Gudgeon in the River Witham

Largest measured gudgeon: 18.3 cm

The largest gudgeon measured in Environment Agency surveys of the River Witham was 18.3 cm, recorded at Upstream Foston Ford on 8 March 1988.

Across 9,861 measured gudgeon, the median measured length was 9.1 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 Witham.

See gudgeon records across England →

Most recent observation12 November 2025Belton Park - DS Habitat Site · 5 fish

Largest measured gudgeon: 18.3 cm
Median length: 9.1 cm
Fish measured: 9,861
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.

Length	Survey date	Survey location	Survey ID
18.3 cm	8 Mar 1988	Upstream Foston Ford	53101
18 cm	8 Mar 1988	Upstream Foston Ford	53101
17.4 cm	7 Jun 2024	Marston Bridge	166219
17.3 cm	20 Apr 1994	Marston Bridge	53257
17.3 cm	8 Mar 1988	Upstream Foston Ford	53101
17.2 cm	24 Oct 2008	Sleeper Bridge (Witham)	115588
17.2 cm	19 Apr 1994	Sleeper Bridge (Witham)	53256
17.1 cm	20 Apr 1994	Marston Bridge	53257
17.1 cm	5 Sept 1985	Upstream Foston Ford	53000
17 cm	20 Apr 1994	Marston Bridge	53257

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
Belton Park - DS Habitat Site	12 Nov 2025	12 Nov 2025	1
Marston Bridge	16 Sept 1985	7 Jun 2024	7
Haddington Bridge	16 Aug 1985	23 Aug 2023	15
Upstream Beckingham Bridge	10 Sept 1985	3 May 2017	17
Claypole Bridge	9 Sept 1985	2 May 2017	16
Belton Park	9 Sept 2016	9 Sept 2016	1
Sleeper Bridge (Witham)	6 Sept 1985	1 Sept 2011	14
Upstream Foston Ford	5 Sept 1985	17 May 2011	15
Upstream Syston Weir	26 Sept 1985	12 Oct 2007	2
Upstream Bracebridge Bridge	30 Jul 1991	18 Sept 2007	4
Short Ferry (Witham)	4 Jul 1985	20 Jul 2006	8
Five Mile House Bridge (Witham)	3 Jul 1985	18 Jul 2006	7
Tattershall Bridge (Witham)	15 Jul 1985	13 Jul 2005	7
Kirkstead Bridge (Witham)	10 Jul 1985	12 Jul 2005	8
Ex Power Station (Witham)	26 Sept 1991	25 Jun 2004	4
Kirks Farm R/B (Witham)	22 Jul 1985	18 Jul 2003	5
Pelhams Land R/B (Witham)	18 Jul 1985	25 Jul 2002	4
Tunnard Farm (Witham)	8 Aug 1988	29 Jun 2000	2
Thorpe Tilney Road (Witham)	11 Jul 1985	15 Jun 2000	5
Greetwell Hall (Witham)	2 Jul 1985	2 Jun 1998	3
Blackmoor Farm Witham	9 Oct 1985	17 Sept 1997	2
Bassingham Upstream Bridge	18 Sept 1985	10 Sept 1997	5
Stapleford	11 Sept 1985	24 Jul 1997	4
Dry Doddington	4 Oct 1985	11 Jul 1997	4
A607 Road Bridge	28 Aug 1985	27 May 1997	5
Dixon Street	27 Sept 1994	27 Sept 1994	1
North Hykeham Bridge	23 Oct 1985	11 Aug 1994	4
Beech House Farm L/B (Witham)	17 Jul 1985	4 Jul 1994	3
Stixwould (Witham)	9 Jul 1985	22 Jun 1994	4
Southrey (Witham)	8 Jul 1985	21 Jun 1994	4
Downstream R/B Beet Factory (Witham)	25 Jul 1985	20 Jun 1994	4
Upstream R/B Bardney Bridge (Witham)	21 Jul 1988	13 Jun 1994	2
Claypole B	22 Apr 1994	22 Apr 1994	1
Barnby	22 Jul 1991	22 Jul 1991	1
Marston Mill	21 May 1991	21 May 1991	1
Chapel Hill (Witham)	24 Jul 1985	3 Aug 1988	2
Barkston Bridge	25 Sept 1985	7 Mar 1988	2
Queen Elizabeth Park	12 Sept 1985	4 Mar 1988	2
Upstream Elinors Weir	23 Sept 1985	1 Mar 1988	2
Hougham Mill - Marston Mill	4 Sept 1985	4 Sept 1985	1
Hougham Mill	29 Aug 1985	29 Aug 1985	1

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

1985–2025

Survey records by year

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

3185

086

087

2688

089

090

2291

092

093

2494

095

096

1197

398

099

500

001

1102

903

804

605

706

707

508

409

510

611

012

013

314

015

116

317

018

019

020

021

022

123

124

125

Fish measured by surveyors

Measured length distribution

See how the 9,861 measured fish were spread across different length ranges.

Smallest: 2.7 cm
Lower quarter: 8 cm
Median: 9.1 cm
Upper quarter: 10.5 cm
Largest: 18.3 cm

0–99 mm

6372

100–199 mm

3489

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Witham

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

Dace Roach European eel Perch Pike Stone loach

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 →