Tench · Tinca tinca

Tench in the Sandon Brook (Main Reaches)

Largest measured tench: 40.1 cm

The largest tench measured in Environment Agency surveys of the Sandon Brook (Main Reaches) was 40.1 cm, recorded at Boreham Bridge (Sandon Brook) on 28 April 1995.

Across 20 measured tench, the median measured length was 20.6 cm.

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

See tench records across England →

Most recent observation9 May 2025Boreham Bridge (Sandon Brook) · 3 fish

Largest measured tench: 40.1 cm
Median length: 20.6 cm
Fish measured: 20
Survey locations: 2

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
40.1 cm	28 Apr 1995	Boreham Bridge (Sandon Brook)	14494
39.2 cm	6 May 1992	Boreham Bridge (Sandon Brook)	14490
38.1 cm	6 May 1992	Boreham Bridge (Sandon Brook)	14490
35.5 cm	28 Apr 1995	Boreham Bridge (Sandon Brook)	14494
35 cm	28 Apr 1995	Boreham Bridge (Sandon Brook)	14494
33.2 cm	29 May 2001	Danbury Road FGS	15600
31 cm	6 May 1992	Boreham Bridge (Sandon Brook)	14490
26 cm	4 Jun 2001	Boreham Bridge (Sandon Brook)	15597
23.1 cm	28 Apr 1995	Boreham Bridge (Sandon Brook)	14494
21 cm	20 May 1998	Boreham Bridge (Sandon Brook)	14498

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
Boreham Bridge (Sandon Brook)	9 May 1986	9 May 2025	7
Danbury Road FGS	29 May 2001	29 May 2001	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.

186

087

088

089

090

091

192

093

094

195

096

097

198

099

000

201

002

003

004

005

006

007

008

009

010

011

012

113

014

015

016

017

018

019

020

021

022

023

024

125

Fish measured by surveyors

Measured length distribution

See how the 20 measured fish were spread across different length ranges.

Smallest: 10.6 cm
Lower quarter: 14.4 cm
Median: 20.6 cm
Upper quarter: 33.7 cm
Largest: 40.1 cm

100–199 mm

200–299 mm

300–399 mm

400–499 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Sandon Brook (Main Reaches)

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

Chub European eel Roach Dace Pike 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 →