RiverFish

Perch · Perca fluviatilis

Perch in the River Colne

Largest measured perch: 40.1 cm

The largest perch measured in Environment Agency surveys of the River Colne was 40.1 cm, recorded at Cricket Ground on 11 May 2009.

Across 2,935 measured perch, the median measured length was 12.5 cm.

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 perch records across England →

Most recent observation10 June 2026Brook Street Farm · 1 fish
Largest measured perch
40.1 cm
Median length
12.5 cm
Fish measured
2,935
Survey locations
29

Individual EA measurements

Largest measured perch

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

LengthSurvey dateSurvey locationSurvey ID
40.1 cm11 May 2009Cricket Ground117212
36.1 cm2 Jun 2008Fiddlers Mill111194
34.7 cm21 May 2008Broom House111110
34.3 cm6 May 2010Earls Colne FGS121650
33.5 cm11 May 2009Cricket Ground117212
33.3 cm24 May 2023Cricket Ground162729
33 cm18 Jun 2008Swanscombe Farm111840
32.7 cm26 May 2009Earls Colne FGS117323
32.7 cm1 Jul 2005The Hedinghams86416
32.4 cm24 May 2023Cricket Ground162729

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

Explore the river

Where perch were found

Each point marks a survey location with at least one perch 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 surveyedFirst recordedLast recordedVisits finding perch
Brook Street Farm10 Sept 198710 Jun 20267
Box Mill11 Apr 19843 Jun 202613
Fordstreet11 May 198414 May 202612
Spring Lane16 May 19847 May 202612
Earls Colne FGS31 Aug 19906 May 202617
Nunnery Bridge4 May 198413 Jun 20238
Cricket Ground28 Jul 198724 May 202319
The Hedinghams8 May 198428 Jun 201710
Blue Bridge12 Apr 198413 Jun 201711
Wakes Colne Viaduct14 Aug 19875 Jun 201716
North Bridge29 Jul 198729 Apr 201415
Maplestead Mill10 Apr 19848 Jun 201110
Broom House21 Aug 198726 May 20114
Chalkney Mill18 Aug 198724 May 20118
Swanscombe Farm18 Apr 198418 Jun 20089
Halstead24 Sept 198710 Jun 20086
Earls Colne Mill16 Apr 19846 Jun 20089
Elms Hall20 Aug 19875 Jun 20086
Fiddlers Mill11 Aug 19872 Jun 20083
Cooks Mill21 Aug 199015 May 20084
Bathing Pool22 May 19849 May 20087
Castle Park23 May 19847 May 20089
Poole Street20 Sept 199020 Jul 20056
Alderford Mill9 May 198429 Jun 20056
Upstream A12 Bridge21 May 198429 May 20026
Downstream New Bridge17 May 198420 May 20025
Great Porters Farm22 Sept 199322 Sept 19931
Upstream Blue Bridge17 Sept 199016 Sept 19932
Does Corner19 Sept 199019 Sept 19901

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

1984–2026

Survey records by year

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

Fish measured by surveyors

Measured length distribution

See how the 2,935 measured fish were spread across different length ranges.

Smallest
4.9 cm
Lower quarter
9.8 cm
Median
12.5 cm
Upper quarter
15.5 cm
Largest
40.1 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Colne

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

Roach European eel Gudgeon Dace Pike 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 →