Perch · Perca fluviatilis

Perch in the Cowfold Stream

Largest measured perch: 21.3 cm

The largest perch measured in Environment Agency surveys of the Cowfold Stream was 21.3 cm, recorded at Shermanbury Place on 14 July 1998.

Across 51 measured perch, the median measured length was 10.9 cm.

Surveyors recorded weights for 30 perch. The median was 0.6 oz (0.018 kg) and the largest recorded weight was 6.1 oz (0.174 kg).

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

See perch records across England →

Most recent observation7 May 2026Sheepfield Shaw · 6 fish

Largest measured perch: 21.3 cm
Median length: 10.9 cm
Fish measured: 51
Survey locations: 3

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
21.3 cm	14 Jul 1998	Shermanbury Place	72662
20.6 cm	14 Jul 1998	Shermanbury Place	72662
20 cm	14 Jul 1998	Shermanbury Place	72662
19.9 cm	14 Jul 1998	Shermanbury Place	72662
19.6 cm	14 Jul 1998	Shermanbury Place	72662
19.5 cm	14 Jul 1998	Shermanbury Place	72662
17.3 cm	2 Mar 1998	Eastlands Farm	72653
16.6 cm	7 May 2026	Sheepfield Shaw	181271
16.3 cm	7 May 2026	Sheepfield Shaw	181271
15.6 cm	7 May 2026	Sheepfield Shaw	181271

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
Sheepfield Shaw	15 May 2014	7 May 2026	2
Eastlands Farm	2 Mar 1998	2 Sept 2002	2
Shermanbury Place	14 Jul 1998	14 Jul 1998	1

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

1998–2026

Survey records by year

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

298

099

000

001

102

003

004

005

006

007

008

009

010

011

012

013

114

015

016

017

018

019

020

021

022

023

024

025

126

Fish measured by surveyors

Measured length distribution

See how the 51 measured fish were spread across different length ranges.

Smallest: 5.9 cm
Lower quarter: 9.6 cm
Median: 10.9 cm
Upper quarter: 14.6 cm
Largest: 21.3 cm

0–99 mm

100–199 mm

200–299 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 30 perch. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0.2 oz (0.006 kg)
Lower quarter: 0.5 oz (0.0142 kg)
Median: 0.6 oz (0.018 kg)
Upper quarter: 2.2 oz (0.0625 kg)
Heaviest: 6.1 oz (0.174 kg)

These are direct individual weights recorded by Environment Agency surveyors. Combined bulk weights are not included.

More fish in this river

Explore the Cowfold Stream

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

European eel Gudgeon Stone loach Brown / sea trout Bullhead 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 →