Tench · Tinca tinca

Tench in the River Colne

Largest measured tench: 39 cm

The largest tench measured in Environment Agency surveys of the River Colne was 39 cm, recorded at Stanwell Road on 8 May 1986.

Across 62 measured tench, the median measured length was 14.8 cm.

Surveyors recorded weights for 7 tench. The median was 7 oz (0.199 kg) and the largest recorded weight was 1 lb 15.1 oz (0.883 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 Colne.

See tench records across England →

Most recent observation12 June 2025Springwell Lane · 3 fish

Largest measured tench: 39 cm
Median length: 14.8 cm
Fish measured: 62
Survey locations: 8

Individual EA measurements

Largest measured tench

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
39 cm	8 May 1986	Stanwell Road	115697
35 cm	16 Jul 2019	Springwell Lane	154796
31.5 cm	12 Mar 1986	Moor roundabout 2	116074
24.9 cm	12 Feb 1986	Maple Cross	115814
23.9 cm	9 Aug 2005	Springwell Lane	86949
23 cm	13 Jun 2024	Wall Hall	166452
22.8 cm	3 Jul 2004	Springwell Lane	81495
22.4 cm	28 Jul 2005	Uxbridge	85239
22.2 cm	12 Feb 1986	Maple Cross	115814
22 cm	12 Feb 1986	Maple Cross	115814

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where tench were found

Each point marks a survey location with at least one tench 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 tench
Springwell Lane	17 Jul 2003	12 Jun 2025	13
Uxbridge	28 Jul 2005	4 Jul 2024	5
Wall Hall	13 Jun 2024	13 Jun 2024	1
u/s West Drayton Mill	30 Sept 2014	30 Sept 2014	1
Denham	1 Dec 2004	5 Oct 2006	2
Stanwell Road	8 May 1986	8 May 1986	1
Moor roundabout 2	12 Mar 1986	12 Mar 1986	1
Maple Cross	12 Feb 1986	12 Feb 1986	1

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

1986–2025

Survey records by year

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

386

087

088

089

090

091

092

093

094

095

096

097

098

099

000

001

002

103

204

205

106

107

208

009

110

011

112

013

114

115

016

117

118

119

020

021

122

123

324

125

Fish measured by surveyors

Measured length distribution

See how the 62 measured fish were spread across different length ranges.

Smallest: 6.5 cm
Lower quarter: 12.3 cm
Median: 14.8 cm
Upper quarter: 19.4 cm
Largest: 39 cm

0–99 mm

100–199 mm

200–299 mm

300–399 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 7 tench. This is a subset of the measured fish and may not represent the whole population.

Lightest: 5 oz (0.143 kg)
Lower quarter: 6.7 oz (0.1895 kg)
Median: 7 oz (0.199 kg)
Upper quarter: 1 lb 0.1 oz (0.457 kg)
Heaviest: 1 lb 15.1 oz (0.883 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 Colne

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

Chub Perch Roach Pike Dace Gudgeon

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 →