RiverFish

Perch · Perca fluviatilis

Perch in the River Box (Main Reaches)

Largest measured perch: 20.1 cm

The largest perch measured in Environment Agency surveys of the River Box (Main Reaches) was 20.1 cm, recorded at Stour Confluence on 6 June 2012.

Across 129 measured perch, the median measured length was 9.1 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 Box (Main Reaches).

See perch records across England →

Most recent observation22 May 2026Stour Confluence · 3 fish
Largest measured perch
20.1 cm
Median length
9.1 cm
Fish measured
129
Survey locations
2

Individual EA measurements

Largest measured perch

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

LengthSurvey dateSurvey locationSurvey ID
20.1 cm6 Jun 2012Stour Confluence132348
17.7 cm22 May 2026Stour Confluence181412
17 cm2 May 1997Thorington Mill13800
16.5 cm15 May 2006Stour Confluence100298
16.3 cm2 May 1997Thorington Mill13800
16.1 cm1 May 1997Stour Confluence13799
15.7 cm30 May 2018Stour Confluence154316
15.7 cm12 Apr 1991Thorington Mill13786
15.6 cm10 Apr 1991Stour Confluence13785
15.2 cm6 Jun 2012Stour Confluence132348

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

Explore the river

Where perch were found

Each point marks a survey location with at least one perch 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 perch
Stour Confluence10 Apr 199122 May 202614
Thorington Mill12 Apr 199131 May 20188

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

1991–2026

Survey records by year

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

Fish measured by surveyors

Measured length distribution

See how the 129 measured fish were spread across different length ranges.

Smallest
6.5 cm
Lower quarter
8.1 cm
Median
9.1 cm
Upper quarter
13.1 cm
Largest
20.1 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Box (Main Reaches)

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

European eel Brown / sea trout Stone loach Dace Roach Chub

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 →