RiverFish

Roach · Rutilus rutilus

Roach in the River Blackwater

Largest measured roach: 39 cm

The largest roach measured in Environment Agency surveys of the River Blackwater was 39 cm, recorded at Kelvedon Coalyard on 18 September 2017.

Across 21,334 measured roach, the median measured length was 12 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 Blackwater.

See roach records across England →

Most recent observation8 November 2023Dorewards Hall · 38 fish
Largest measured roach
39 cm
Median length
12 cm
Fish measured
21,334
Survey locations
24

Individual EA measurements

Largest measured roach

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

LengthSurvey dateSurvey locationSurvey ID
39 cm18 Sept 2017Kelvedon Coalyard152423
37.4 cm18 Sept 2017Kelvedon Coalyard152423
36.5 cm23 Sept 2023Kelvedon Coalyard164441
35.8 cm27 Sept 1999Kelvedon Coalyard14192
35.7 cm23 Sept 2023Kelvedon Coalyard164441
35.1 cm27 Sept 1999Kelvedon Coalyard14192
35 cm13 Sept 2004Kelvedon Coalyard83262
34.9 cm18 Sept 2017Kelvedon Coalyard152423
34.6 cm27 Sept 1999Kelvedon Coalyard14192
34 cm26 Sept 2006Coggeshall101960

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

Explore the river

Where roach were found

Each point marks a survey location with at least one roach 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 roach
Dorewards Hall19 Jul 19848 Nov 202312
Pointwell Mill24 Jul 198426 Oct 202311
Smallands Hall10 Aug 198412 Oct 202313
Braxted FGS6 Aug 198411 Oct 202317
Upstream Braxted Hall8 Aug 19847 Oct 202310
Greys Mill20 Jul 19844 Oct 202313
Saint Marys Road27 Jul 19843 Oct 202312
Stock Hall13 Aug 19841 Oct 202313
Blue Mills9 Aug 198428 Sept 202320
Coggeshall18 Jul 198426 Sept 202320
Kelvedon Coalyard31 Jul 198423 Sept 202320
Rye Mill14 Apr 198721 Sept 202310
Bradwell Hall23 Jul 198419 Sept 202311
Stisted FGS13 Jul 198415 Sept 202320
Upstream Langford Intake26 Jul 201326 Jul 20131
Langford14 Aug 19849 Oct 20089
Downstream Braxted Hall7 Aug 198430 Sept 20089
Ashmans Farm16 Apr 198719 Sept 20086
Feeringbury Hall26 Jul 198415 Sept 20088
Covenbrook Hall7 May 198710 Sept 20086
West Mill9 Apr 19908 Sept 20087
Bradwell Bridge12 Jul 19845 Sept 20089
Lyons Hall (River Blackwater)10 Jul 19842 Sept 20089
Hobbs Meadow11 Jul 19841 Sept 20089

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

1984–2023

Survey records by year

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

Fish measured by surveyors

Measured length distribution

See how the 21,334 measured fish were spread across different length ranges.

Smallest
2.2 cm
Lower quarter
8.8 cm
Median
12 cm
Upper quarter
16.2 cm
Largest
39 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Blackwater

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

Chub Gudgeon European eel Perch Dace 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 →