Gudgeon · Gobio gobio

Gudgeon in the River Blackwater

Largest measured gudgeon: 15.5 cm

The largest gudgeon measured in Environment Agency surveys of the River Blackwater was 15.5 cm, recorded at Broadlands Fishery on 19 September 2024.

Across 44 measured gudgeon, the median measured length was 12 cm.

Surveyors recorded weights for 5 gudgeon. The median was 0.4 oz (0.01 kg) and the largest recorded weight was 0.6 oz (0.016 kg).

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

See gudgeon records across England →

Most recent observation16 September 2025Broadlands Fishery · 4 fish

Largest measured gudgeon: 15.5 cm
Median length: 12 cm
Fish measured: 44
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
15.5 cm	19 Sept 2024	Broadlands Fishery	167854
15.2 cm	15 Sept 2022	Broadlands Fishery	161536
15.1 cm	28 Sept 2021	Broadlands Fishery	160408
14.3 cm	14 Sept 2020	Broadlands Fishery	156393
14.2 cm	15 Sept 2022	Broadlands Fishery	161536
14 cm	16 Sept 2025	Broadlands Fishery	178978
14 cm	20 Sept 2011	Upper Whinwhistle	128011
13.8 cm	20 Sept 2011	Broadlands Fishery	128015
13.5 cm	19 Sept 2024	Broadlands Fishery	167854
13.5 cm	19 Sept 2023	Landford	163438

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
Broadlands Fishery	20 Sept 2011	16 Sept 2025	8
Landford	19 Sept 2023	19 Sept 2023	1
Upper Whinwhistle	20 Sept 2011	20 Sept 2011	1
Wade Bridge	16 Sept 2002	30 Aug 2006	4
Hammonds Farm	6 Sept 2004	6 Sept 2004	1

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

2002–2025

Survey records by year

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

102

103

104

105

106

007

008

009

010

211

012

013

014

015

016

017

118

119

120

121

122

123

124

125

Fish measured by surveyors

Measured length distribution

See how the 44 measured fish were spread across different length ranges.

Smallest: 6.5 cm
Lower quarter: 11 cm
Median: 12 cm
Upper quarter: 13.4 cm
Largest: 15.5 cm

0–99 mm

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 5 gudgeon. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0.1 oz (0.004 kg)
Lower quarter: 0.3 oz (0.008 kg)
Median: 0.4 oz (0.01 kg)
Upper quarter: 0.4 oz (0.01 kg)
Heaviest: 0.6 oz (0.016 kg)

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

More fish in this river

Explore the River Blackwater

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

Roach Bullhead European eel Dace Brown / sea trout 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 →