RiverFish

Perch · Perca fluviatilis

Perch in the Bear Brook

Largest measured perch: 25.2 cm

The largest perch measured in Environment Agency surveys of the Bear Brook was 25.2 cm, recorded at Downstream Haydon Mill Farm on 11 September 2003.

Across 47 measured perch, the median measured length was 10.7 cm.

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

See perch records across England →

Most recent observation2 September 2025Downstream of Oakfield · 2 fish
Largest measured perch
25.2 cm
Median length
10.7 cm
Fish measured
47
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
25.2 cm11 Sept 2003Downstream Haydon Mill Farm77282
20.8 cm2 Sept 2014Downstream of Oakfield142505
19.2 cm11 Sept 2003Downstream Haydon Mill Farm77282
18.9 cm11 Sept 2003Downstream Haydon Mill Farm77282
18.8 cm2 Sept 2014Downstream of Oakfield142505
17.9 cm8 Sept 2004Downstream Haydon Mill Farm82025
17.7 cm2 Sept 2025Downstream of Oakfield178295
17.7 cm2 Sept 2014Downstream of Oakfield142505
17.1 cm11 Sept 2003Downstream Haydon Mill Farm77282
16.9 cm8 Sept 2004Downstream Haydon Mill Farm82025

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
Downstream of Oakfield2 Sept 20142 Sept 20252
Downstream Haydon Mill Farm11 Sept 20032 Sept 20143

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

2003–2025

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 47 measured fish were spread across different length ranges.

Smallest
5.2 cm
Lower quarter
6.4 cm
Median
10.7 cm
Upper quarter
16.3 cm
Largest
25.2 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Bear Brook

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

Roach

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 →