Perch · Perca fluviatilis

Perch in the River Len

Largest measured perch: 29.3 cm

The largest perch measured in Environment Agency surveys of the River Len was 29.3 cm, recorded at Fulling Mill on 16 August 2004.

Across 214 measured perch, the median measured length was 10.2 cm.

Surveyors recorded weights for 22 perch. The median was 0.6 oz (0.018 kg) and the largest recorded weight was 1.1 oz (0.032 kg).

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

See perch records across England →

Most recent observation24 July 2023Turkey Mill · 106 fish

Largest measured perch: 29.3 cm
Median length: 10.2 cm
Fish measured: 214
Survey locations: 4

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
29.3 cm	16 Aug 2004	Fulling Mill	82993
27.6 cm	2 Oct 2009	Caring Lane	120352
24.7 cm	16 Aug 2004	Fulling Mill	82993
24.3 cm	2 Oct 2009	Caring Lane	120352
24.1 cm	2 Oct 2009	Caring Lane	120352
23.4 cm	24 Jul 2023	Turkey Mill	163087
19.2 cm	12 Aug 2010	Fulling Mill	123372
17.5 cm	12 Aug 2010	Fulling Mill	123372
17.5 cm	12 Aug 2010	Fulling Mill	123372
17.1 cm	2 Aug 2004	Turkey Mill	82950

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
Turkey Mill	20 Aug 2002	24 Jul 2023	5
Fulling Mill	16 Aug 2004	12 Jul 2023	4
Leeds Castle 1	8 Oct 2009	8 Oct 2009	1
Caring Lane	2 Oct 2009	2 Oct 2009	1

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

2002–2023

Survey records by year

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

102

003

204

005

006

007

008

209

110

111

012

013

014

015

016

217

018

019

020

021

022

223

Fish measured by surveyors

Measured length distribution

See how the 214 measured fish were spread across different length ranges.

Smallest: 4 cm
Lower quarter: 5.6 cm
Median: 10.2 cm
Upper quarter: 12.4 cm
Largest: 29.3 cm

0–99 mm

100–199 mm

110

200–299 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 22 perch. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0.5 oz (0.014 kg)
Lower quarter: 0.5 oz (0.014 kg)
Median: 0.6 oz (0.018 kg)
Upper quarter: 0.7 oz (0.0195 kg)
Heaviest: 1.1 oz (0.032 kg)

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

More fish in this river

Explore the River Len

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

European eel Gudgeon Pike Roach Common bream Bullhead

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 →