RiverFish

Perch · Perca fluviatilis

Perch in the River Mole

Largest measured perch: 41.9 cm

The largest perch measured in Environment Agency surveys of the River Mole was 41.9 cm, recorded at Meath Green Farm, Horley on 20 September 2012.

Across 755 measured perch, the median measured length was 14.3 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 Mole.

See perch records across England →

Most recent observation29 July 2025Castlefields · 6 fish
Largest measured perch
41.9 cm
Median length
14.3 cm
Fish measured
755
Survey locations
20

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
41.9 cm20 Sept 2012Meath Green Farm, Horley133762
41.5 cm28 Sept 2010Downstream Downside Mill124246
41.5 cm29 Sept 2005Meath Green Farm, Horley87032
41.2 cm18 Sept 2012Downstream Downside Mill133662
41 cm20 Sept 2012Meath Green Farm, Horley133762
40.7 cm28 Sept 2010Downstream Downside Mill124246
40.5 cm1 Oct 2008Downstream Downside Mill115070
40.1 cm29 Sept 2010Meath Green Farm, Horley124244
40.1 cm25 Sept 2003Meath Green Farm, Horley77154
39.5 cm30 Sept 2008Meath Green Farm, Horley115089

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
Castlefields29 Jul 202529 Jul 20251
Downstream Gatwick17 Sept 19859 Jul 20259
Downstream Painshill23 Oct 20073 Jul 20258
Norbury Park, Near Mickleham16 Feb 199317 Oct 20234
Horley Swimming Baths17 Jul 199214 Nov 20176
Box Hill2 Oct 200320 Oct 20157
Meath Green Farm, Horley1 Oct 199230 Sept 201513
Old Mole Channel20 Jun 198617 Oct 20127
Downstream Downside Mill25 Feb 199318 Sept 20125
Flanchford Farm7 Oct 200328 Nov 20053
Povey Cross Enhancement Scheme20 Aug 200220 Aug 20021
South Weylands Farm7 May 19937 May 19931
Garsons Farm11 Mar 199311 Mar 19931
Norwood Farm Downstream Cobham9 Mar 19939 Mar 19931
Below Downside Bridge, Cobham.4 Mar 19934 Mar 19931
Upstream Brockham Bridge4 Feb 19934 Feb 19931
Upstream Betchworth Weir15 Oct 199215 Oct 19921
Upstream Sidlow Bridge18 May 198918 May 19891
Upstream Horley STW19 Sept 198516 May 19892
Downstream Brockham Bridge8 Oct 19858 Oct 19851

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

1985–2025

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 755 measured fish were spread across different length ranges.

Smallest
4.5 cm
Lower quarter
10.5 cm
Median
14.3 cm
Upper quarter
21 cm
Largest
41.9 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Mole

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

Roach Dace Chub Gudgeon Minnow Stone loach

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 →