Roach · Rutilus rutilus

Roach in the River Len

Largest measured roach: 28.6 cm

The largest roach measured in Environment Agency surveys of the River Len was 28.6 cm, recorded at Turkey Mill on 2 August 2004.

Across 2,234 measured roach, the median measured length was 9.3 cm.

Surveyors recorded weights for 61 roach. The median was 1.4 oz (0.04 kg) and the largest recorded weight was 7.1 oz (0.202 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 roach records across England →

Most recent observation24 July 2023Turkey Mill · 817 fish

Largest measured roach: 28.6 cm
Median length: 9.3 cm
Fish measured: 2,234
Survey locations: 4

Individual EA measurements

Largest measured roach

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
28.6 cm	2 Aug 2004	Turkey Mill	82950
28.5 cm	1 Aug 2017	Turkey Mill	151120
27.4 cm	24 Jul 2023	Turkey Mill	163087
27 cm	1 Aug 2017	Turkey Mill	151120
26 cm	2 Aug 2004	Turkey Mill	82950
23.7 cm	2 Oct 2009	Caring Lane	120352
22.5 cm	1 Aug 2017	Turkey Mill	151120
22.5 cm	2 Oct 2009	Caring Lane	120352
22.5 cm	20 Aug 2002	Turkey Mill	66820
22.2 cm	1 Aug 2017	Turkey Mill	151120

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where roach were found

Each point marks a survey location with at least one roach 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 roach
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 roach that year.

102

003

204

005

006

007

008

209

010

211

012

013

014

015

016

217

018

019

020

021

022

223

Fish measured by surveyors

Measured length distribution

See how the 2,234 measured fish were spread across different length ranges.

Smallest: 2.8 cm
Lower quarter: 8 cm
Median: 9.3 cm
Upper quarter: 11 cm
Largest: 28.6 cm

0–99 mm

1364

100–199 mm

834

200–299 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 61 roach. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0.1 oz (0.004 kg)
Lower quarter: 0.2 oz (0.006 kg)
Median: 1.4 oz (0.04 kg)
Upper quarter: 2.1 oz (0.06 kg)
Heaviest: 7.1 oz (0.202 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 Perch Pike 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 →