RiverFish

Perch · Perca fluviatilis

Perch in the River Calder

Largest measured perch: 37.2 cm

The largest perch measured in Environment Agency surveys of the River Calder was 37.2 cm, recorded at Brighouse Industrial Estate on 3 July 2008.

Across 660 measured perch, the median measured length was 13.4 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 Calder.

See perch records across England →

Most recent observation14 August 2025Dewsbury Fry Survey · 5 fish
Largest measured perch
37.2 cm
Median length
13.4 cm
Fish measured
660
Survey locations
16

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
37.2 cm3 Jul 2008Brighouse Industrial Estate111876
37 cm25 Jul 2005Brighouse Industrial Estate87550
36.8 cm25 Jun 1999High Royds S.T.W109483
36.6 cm2 Sept 2007Brighouse Industrial Estate108405
36.5 cm16 Sept 2004Brighouse Industrial Estate83548
36.3 cm3 Jul 2008Brighouse Industrial Estate111876
36.3 cm2 Sept 2007Brighouse Industrial Estate108405
36.2 cm6 Jul 2010Brighouse Industrial Estate122858
35 cm7 Jul 2003Brighouse Industrial Estate78566
34.4 cm6 Jul 2009Brighouse Industrial Estate117765

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
Dewsbury Fry Survey14 Aug 202514 Aug 20251
Chantry Bridge10 Jul 200224 Jun 202412
Warmans Industrial Estate7 Sept 20237 Sept 20231
Sands Mill (Dewsbury)22 Jun 201522 Jun 20151
Methley28 Jul 200619 Jun 20153
Cornmill Weir12 Jul 199919 Jun 201510
Brighouse - Fry Survey14 Aug 201318 Aug 20142
Dewsbury (end of flood relief channel)26 Jul 200530 Jul 20126
Brighouse Industrial Estate8 Jul 19996 Jul 20109
Smalley Bight22 Jul 19997 Jul 20062
Eastwood S.T.W26 Aug 200326 Aug 20031
Ravensthorpe at weir (old site)11 Jul 200215 Jul 20032
Anchor Pits - Fry Survey20 Sept 200026 Sept 20022
Brookfoot5 Jul 19995 Jul 19991
High Royds S.T.W25 Jun 199925 Jun 19991
Elland - Fry Survey19 Sept 199519 Sept 19951

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

1995–2025

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 660 measured fish were spread across different length ranges.

Smallest
1.5 cm
Lower quarter
9.3 cm
Median
13.4 cm
Upper quarter
17.9 cm
Largest
37.2 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Calder

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

Brown / sea trout Stone loach Bullhead Gudgeon Chub 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 →