RiverFish

Roach · Rutilus rutilus

Roach in the River Thurne

Largest measured roach: 24.2 cm

The largest roach measured in Environment Agency surveys of the River Thurne was 24.2 cm, recorded at Potter Heigham inner basin on 26 February 2013.

Across 1,207 measured roach, the median measured length was 11.2 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 Thurne.

See roach records across England →

Most recent observation16 January 2025Potter Heigham inner basin · 43 fish
Largest measured roach
24.2 cm
Median length
11.2 cm
Fish measured
1,207
Survey locations
2

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
24.2 cm26 Feb 2013Potter Heigham inner basin135590
23.2 cm6 Feb 2015Potter Heigham inner basin144348
22.5 cm27 Jan 2014Potter Heigham inner basin140528
22.3 cm24 Feb 2017Potter Heigham inner basin150306
22.3 cm9 Feb 2016Potter Heigham inner basin147729
22.3 cm26 Feb 2013Potter Heigham inner basin135590
22 cm6 Feb 2015Potter Heigham inner basin144348
21.6 cm15 Jan 2018Potter Heigham inner basin152475
21.4 cm6 Feb 2015Potter Heigham inner basin144348
21.3 cm6 Feb 2015Potter Heigham inner basin144348

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
Potter Heigham inner basin27 Jan 200516 Jan 202514
Martham Boat Dyke25 Feb 200825 Feb 20081

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

2005–2025

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 1,207 measured fish were spread across different length ranges.

Smallest
3.5 cm
Lower quarter
9.3 cm
Median
11.2 cm
Upper quarter
13.2 cm
Largest
24.2 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Thurne

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

Common bream Pike Rudd Perch

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 →