RiverFish

Roach · Rutilus rutilus

Roach in the River Ember FAS

Largest measured roach: 30.3 cm

The largest roach measured in Environment Agency surveys of the River Ember FAS was 30.3 cm, recorded at Downstream Esher STW on 22 May 1990.

Across 2,534 measured roach, the median measured length was 10.5 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 Ember FAS.

See roach records across England →

Most recent observation24 July 2025Below Island Barn Weir · 164 fish
Largest measured roach
30.3 cm
Median length
10.5 cm
Fish measured
2,534
Survey locations
4

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
30.3 cm22 May 1990Downstream Esher STW103252
29.6 cm22 May 1990Downstream Esher STW103252
28.7 cm22 May 1990Downstream Esher STW103252
28.6 cm22 May 1990Downstream Esher STW103252
27.4 cm28 May 1993Below Island Barn Weir103180
27.3 cm22 May 1990Downstream Esher STW103252
26.7 cm26 Sept 2007Below Island Barn Weir106966
26.3 cm22 May 1990Downstream Esher STW103252
26.1 cm22 May 1990Downstream Esher STW103252
25.8 cm28 May 1993Below Island Barn Weir103180

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
Below Island Barn Weir28 May 199324 Jul 202512
Old Ember Channel opposite Orchard Lane16 Nov 200612 Oct 20092
Downstream Esher STW15 Jul 198614 May 19933
Upstream Esher STW22 May 199022 May 19901

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 roach that year.

Fish measured by surveyors

Measured length distribution

See how the 2,534 measured fish were spread across different length ranges.

Smallest
2.9 cm
Lower quarter
6.7 cm
Median
10.5 cm
Upper quarter
13.6 cm
Largest
30.3 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Ember FAS

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

European eel Perch Pike Dace Bleak 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 →