RiverFish

Roach · Rutilus rutilus

Roach in the River Granta

Largest measured roach: 30.3 cm

The largest roach measured in Environment Agency surveys of the River Granta was 30.3 cm, recorded at Babraham (I.A.P) on 16 April 1991.

Across 472 measured roach, the median measured length was 14.6 cm.

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

See roach records across England →

Most recent observation10 June 2025Great Shelford · 34 fish
Largest measured roach
30.3 cm
Median length
14.6 cm
Fish measured
472
Survey locations
5

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 cm16 Apr 1991Babraham (I.A.P)29403
29 cm4 Apr 2007Great Shelford104995
27.2 cm20 May 2025Babraham (I.A.P)177117
26.5 cm26 Apr 2016Hildersham147962
25.8 cm12 Apr 2019Hildersham154430
25.8 cm24 Feb 1997Great Shelford29412
24.8 cm24 Feb 1997Great Shelford29412
24.5 cm26 Apr 2016Hildersham147962
24.3 cm24 Feb 1997Great Shelford29412
23.8 cm24 Feb 1997Great Shelford29412

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
Great Shelford24 Feb 199710 Jun 20257
Babraham3 May 201621 May 20252
Babraham (I.A.P)16 Apr 199120 May 202511
Hildersham27 Oct 199314 May 202510
DS Hildersham16 May 200114 May 20032

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

1991–2025

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 472 measured fish were spread across different length ranges.

Smallest
6 cm
Lower quarter
12.2 cm
Median
14.6 cm
Upper quarter
17 cm
Largest
30.3 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Granta

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

3-spined stickleback Brown / sea trout Bullhead Minnow Stone loach 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 →