Perch · Perca fluviatilis

Perch in the Old West River

Largest measured perch: 36 cm

The largest perch measured in Environment Agency surveys of the Old West River was 36 cm, recorded at Smithy Fen Farm on 13 September 2017.

Across 3,563 measured perch, the median measured length was 7.6 cm.

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

See perch records across England →

Most recent observation13 September 2023Stretham Old Engine · 37 fish

Largest measured perch: 36 cm
Median length: 7.6 cm
Fish measured: 3,563
Survey locations: 10

Individual EA measurements

Largest measured perch

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

Length	Survey date	Survey location	Survey ID
36 cm	13 Sept 2017	Smithy Fen Farm	151646
34.8 cm	10 Oct 2000	Hermitage Marina	30795
31.4 cm	14 Sept 2017	Stretham Old Engine	151647
30.8 cm	18 Sept 1997	Ewell Fen	30001
29.8 cm	15 Nov 1996	Flat Bridge Farm	29992
28.3 cm	25 Nov 1996	Stretham Old Engine	29997
28.3 cm	18 Nov 1996	Ewell Fen	29993
28.1 cm	28 Jul 2014	Stretham Old Engine	141948
27.2 cm	16 Sept 2009	Hermitage Marina	118927
26.5 cm	16 Sept 2009	Hermitage Marina	118927

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 surveyed	First recorded	Last recorded	Visits finding perch
Stretham Old Engine	8 Jul 1988	13 Sept 2023	14
Smithy Fen Farm	6 Jul 1988	7 Sept 2023	14
Flat Bridge Farm	28 Oct 1991	6 Sept 2023	11
Hermitage Marina	4 Jul 1988	5 Sept 2023	14
Willow Grange Farm	8 Jul 1988	15 Sept 2017	13
Australia Farm	7 Jul 1988	18 Oct 2006	7
Ewell Fen	7 Jul 1988	12 Oct 2006	7
Weathersome Common	26 Jul 1988	10 Oct 2006	6
Stretham Ferry Lagoon (No 2)	3 Nov 2005	3 Nov 2005	1
Stretham Ferry Lagoon (No 1)	28 Oct 2004	3 Nov 2005	2

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

1988–2023

Survey records by year

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

788

089

090

791

092

893

094

095

896

897

098

099

800

001

002

503

604

705

806

107

008

509

010

011

012

013

314

015

016

417

018

019

020

021

022

423

Fish measured by surveyors

Measured length distribution

See how the 3,563 measured fish were spread across different length ranges.

Smallest: 2.4 cm
Lower quarter: 6.8 cm
Median: 7.6 cm
Upper quarter: 9.8 cm
Largest: 36 cm

0–99 mm

2768

100–199 mm

768

200–299 mm

300–399 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Old West River

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

Roach Pike Bitterling Tench Bleak Common bream

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 →