Gudgeon · Gobio gobio

Gudgeon in the River Darent

Largest measured gudgeon: 15.5 cm

The largest gudgeon measured in Environment Agency surveys of the River Darent was 15.5 cm, recorded at Lullingstone on 28 August 2009.

Across 996 measured gudgeon, the median measured length was 9.8 cm.

Surveyors recorded weights for 31 gudgeon. The median was 0.6 oz (0.016 kg) and the largest recorded weight was 1.2 oz (0.034 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 Darent.

See gudgeon records across England →

Most recent observation22 July 2026Twitton Brook · 92 fish

Largest measured gudgeon: 15.5 cm
Median length: 9.8 cm
Fish measured: 996
Survey locations: 11

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	28 Aug 2009	Lullingstone	119206
15.2 cm	22 Apr 2015	Sevenoaks Wildfowl Reserve	144632
15 cm	3 May 2017	Horton Kirby	150398
14.8 cm	12 Oct 2010	Lullingstone	125184
14.7 cm	19 Apr 2022	Horton Kirby	160907
14.7 cm	14 Apr 2015	Lullingstone	144604
14.7 cm	25 Aug 2005	Preston Farm	86600
14.6 cm	25 May 2021	Sevenoaks Wildfowl Reserve	160147
14.5 cm	22 Jun 2011	Lullingstone	128541
14.4 cm	20 Apr 2022	Lullingstone	160908

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
Twitton Brook	26 Aug 2003	22 Jul 2026	16
Preston Farm	4 Sept 2002	11 Jun 2026	16
Lullingstone	13 Sept 2007	10 Jun 2026	10
Horton Kirby	13 Jun 2001	14 May 2026	15
Dartford Park	5 Aug 2002	4 Jun 2024	6
Hawley Hall	1 Jun 2011	29 May 2024	5
Sevenoaks Wildfowl Reserve	5 Aug 2009	22 May 2024	9
Sundridge	29 Aug 2006	3 May 2022	3
Quebec House Car Park Westerham	21 Jun 2011	28 Apr 2022	3
Acacia Hall	1 Sept 2003	28 Aug 2009	4
Westerham	4 Jul 2003	22 Aug 2006	4

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

2001–2026

Survey records by year

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

101

202

403

504

505

506

307

308

609

410

711

012

713

314

615

016

717

018

619

020

121

722

023

524

025

426

Fish measured by surveyors

Measured length distribution

See how the 996 measured fish were spread across different length ranges.

Smallest: 2.3 cm
Lower quarter: 8.1 cm
Median: 9.8 cm
Upper quarter: 11.8 cm
Largest: 15.5 cm

0–99 mm

508

100–199 mm

488

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 31 gudgeon. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0.3 oz (0.009 kg)
Lower quarter: 0.4 oz (0.012 kg)
Median: 0.6 oz (0.016 kg)
Upper quarter: 0.8 oz (0.022 kg)
Heaviest: 1.2 oz (0.034 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 Darent

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

Bullhead Roach Perch Brown / sea trout Stone loach 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 →