RiverFish

Perch · Perca fluviatilis

Perch in the River Laleham Abbey

Largest measured perch: 20.1 cm

The largest perch measured in Environment Agency surveys of the River Laleham Abbey was 20.1 cm, recorded at Laleham Abbey Upstream Fry on 26 September 2006.

Across 328 measured perch, the median measured length was 6.2 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 Laleham Abbey.

See perch records across England →

Most recent observation3 September 2025Laleham Abbey Downstream Fry · 8 fish
Largest measured perch
20.1 cm
Median length
6.2 cm
Fish measured
328
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 cm26 Sept 2006Laleham Abbey Upstream Fry111966
15.1 cm3 Sept 2025Laleham Abbey Downstream Fry178519
13.5 cm28 Aug 2013Laleham Abbey Downstream Fry138579
13.2 cm21 Aug 2018Laleham Abbey Downstream Fry153450
12.9 cm21 Aug 2018Laleham Abbey Upstream Fry153449
12.8 cm22 Aug 2007Laleham Abbey Upstream Fry108629
12.3 cm21 Aug 2018Laleham Abbey Upstream Fry153449
12.1 cm19 Aug 2010Laleham Abbey Upstream Fry124735
10.9 cm21 Aug 2018Laleham Abbey Upstream Fry153449
10 cm28 Aug 2013Laleham Abbey Downstream Fry138579

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
Laleham Abbey Downstream Fry27 Aug 20033 Sept 202515
Laleham Abbey Upstream Fry27 Aug 200320 Aug 202412

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 328 measured fish were spread across different length ranges.

Smallest
2.6 cm
Lower quarter
5.2 cm
Median
6.2 cm
Upper quarter
7 cm
Largest
20.1 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Laleham Abbey

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

Gudgeon Roach Bleak Chub Dace Minnow

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 →