Gudgeon · Gobio gobio

Gudgeon in the Roman River (Main Reaches)

Largest measured gudgeon: 15.6 cm

The largest gudgeon measured in Environment Agency surveys of the Roman River (Main Reaches) was 15.6 cm, recorded at Bounstead FGS on 16 September 2021.

Across 409 measured gudgeon, the median measured length was 10 cm.

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the Roman River (Main Reaches).

See gudgeon records across England →

Most recent observation12 October 2025Bounstead FGS · 2 fish

Largest measured gudgeon: 15.6 cm
Median length: 10 cm
Fish measured: 409
Survey locations: 4

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
15.6 cm	16 Sept 2021	Bounstead FGS	160617
15.1 cm	5 Oct 1987	Upstream Layer Mill	14680
14.5 cm	17 Oct 2017	Bounstead FGS	152380
14.3 cm	16 Sept 2021	Bounstead FGS	160617
14.1 cm	16 Sept 2021	Bounstead FGS	160617
14 cm	16 Sept 2021	Bounstead FGS	160617
14 cm	5 Oct 1987	Upstream Layer Mill	14680
13.9 cm	28 Jun 1999	Bounstead FGS	14699
13.8 cm	5 Oct 1987	Upstream Layer Mill	14680
13.7 cm	24 Oct 2019	Bounstead FGS	155849

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
Bounstead FGS	2 Oct 1987	12 Oct 2025	12
Park Farm	15 Mar 1984	21 Oct 2011	6
Olivers Farm	6 Oct 1987	7 Jun 1996	2
Upstream Layer Mill	5 Oct 1987	5 Oct 1987	1

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

1984–2025

Survey records by year

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

184

085

086

387

088

089

090

091

092

293

094

095

396

097

098

299

000

001

002

003

004

205

006

007

008

009

010

111

012

013

014

015

016

117

118

119

020

121

122

023

124

125

Fish measured by surveyors

Measured length distribution

See how the 409 measured fish were spread across different length ranges.

Smallest: 3.4 cm
Lower quarter: 8.6 cm
Median: 10 cm
Upper quarter: 11.2 cm
Largest: 15.6 cm

0–99 mm

201

100–199 mm

208

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Roman River (Main Reaches)

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

European eel Roach Stone loach Dace Brown / sea trout Perch

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 →