RiverFish

Roach · Rutilus rutilus

Roach in the Relief Channel

Largest measured roach: 33.8 cm

The largest roach measured in Environment Agency surveys of the Relief Channel was 33.8 cm, recorded at Stow Bridge on 2 October 1991.

Across 38,410 measured roach, the median measured length was 6.3 cm.

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the Relief Channel.

See roach records across England →

Most recent observation9 August 2023Thiefgate Lane Pylons · 60 fish
Largest measured roach
33.8 cm
Median length
6.3 cm
Fish measured
38,410
Survey locations
19

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
33.8 cm2 Oct 1991Stow Bridge30256
32.3 cm21 Aug 2000Denver Sluice30816
32.3 cm21 Aug 2000Denver Sluice30816
31.8 cm10 Sept 1996DS Downham Bridge30278
31.3 cm21 Aug 2000Denver Sluice30816
31.3 cm21 Aug 2000Denver Sluice30816
31.3 cm6 Sept 1993Downham Market STW30267
30.8 cm22 Aug 2000Downham Bridge30817
30.8 cm21 Aug 2000Denver Sluice30816
30.8 cm21 Aug 2000Denver Sluice30816

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
Thiefgate Lane Pylons9 Aug 20239 Aug 20231
Denver Sluice5 Sept 19888 Aug 20238
Wiggenhall Bridge10 Oct 19919 Aug 20178
DS Stow Bridge8 Sept 19888 Aug 201710
DS Denver Residual Sluice (Eel Monitoring)24 Jul 201224 Jul 20121
DS Denver Sluice9 Oct 20089 Oct 20081
Ivy Farm Saddle Bow21 Aug 200821 Aug 20081
Hastings Farm Wiggenhall21 Aug 200821 Aug 20081
Stow Bridge8 Sept 198819 Aug 20086
Gullpit Farm Stow Bridge19 Aug 200819 Aug 20081
Black Bank Dyke Sluice18 Aug 200818 Aug 20081
Tail Sluice15 Oct 199124 Aug 20055
Saddlebow Bridge27 Sept 198823 Aug 20056
Polver Farm Magdalen9 Oct 199117 Aug 20054
Magdalen Bridge16 Sept 198816 Aug 20056
Holme Farm Magdalen30 Sept 198815 Aug 20056
Downham Market STW7 Sept 198810 Aug 20056
Downham Bridge6 Oct 19889 Aug 20056
DS Downham Bridge6 Sept 19885 Aug 20056

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

1988–2023

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 38,410 measured fish were spread across different length ranges.

Smallest
3.1 cm
Lower quarter
5.8 cm
Median
6.3 cm
Upper quarter
7.3 cm
Largest
33.8 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Relief Channel

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

Perch Ruffe Zander Pike European eel Tench

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 →