Roach · Rutilus rutilus

Roach in the Main River Isle

Largest measured roach: 36.4 cm

The largest roach measured in Environment Agency surveys of the Main River Isle was 36.4 cm, recorded at Ilford Bridges (Te) on 11 June 1992.

Across 1,534 measured roach, the median measured length was 9.1 cm.

Surveyors recorded weights for 667 roach. The median was 0.7 oz (0.019 kg) and the largest recorded weight was 1 lb 11.1 oz (0.768 kg).

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

See roach records across England →

Most recent observation23 June 2022Midelney · 52 fish

Largest measured roach: 36.4 cm
Median length: 9.1 cm
Fish measured: 1,534
Survey locations: 11

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
36.4 cm	11 Jun 1992	Ilford Bridges (Te)	80035
33.5 cm	22 Jun 2005	Ilford Bridges (Te)	84860
28 cm	11 Jun 1992	Ilford Bridges (Te)	80035
27.8 cm	8 Jun 1992	Hambridge	80049
27.6 cm	11 Jun 1992	Ilford Bridges (Te)	80035
25.4 cm	11 Sept 2007	Midelney	108011
24.5 cm	19 May 1992	Earnshill House	80047
24.1 cm	8 Jun 1992	Hambridge	80049
23.6 cm	24 May 2011	Midelney	126391
23.5 cm	7 Jul 1997	Donyatt	79517

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
Midelney	11 Sept 2007	23 Jun 2022	6
Ashford Farm (Te)	29 May 1992	14 Jun 2022	8
Cocks Bridge (Te)	18 Jun 1992	23 Jun 2016	8
Hambridge	8 Jun 1992	24 May 2011	3
Ilford Bridges (Te)	11 Jun 1992	7 Jul 2010	10
Isle Brewers	9 Jun 1992	21 May 2008	3
Manor Farm, Knowle St. Giles (Se-06)	2 Jun 2006	2 Jun 2006	1
Donyatt	25 Jun 1992	7 Jul 1997	2
Winterhay Lane	19 Jun 1992	4 Jul 1997	2
Downstream Westport Canal	14 May 1992	22 Apr 1997	2
Earnshill House	19 May 1992	19 May 1992	1

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

1992–2022

Survey records by year

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

992

093

094

095

096

897

098

099

000

001

102

103

204

205

406

307

508

009

110

311

112

113

114

015

116

117

018

019

020

021

222

Fish measured by surveyors

Measured length distribution

See how the 1,534 measured fish were spread across different length ranges.

Smallest: 1.6 cm
Lower quarter: 6.8 cm
Median: 9.1 cm
Upper quarter: 12 cm
Largest: 36.4 cm

0–99 mm

896

100–199 mm

597

200–299 mm

300–399 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 667 roach. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0 oz (0.001 kg)
Lower quarter: 0.2 oz (0.007 kg)
Median: 0.7 oz (0.019 kg)
Upper quarter: 1.4 oz (0.04 kg)
Heaviest: 1 lb 11.1 oz (0.768 kg)

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

More fish in this river

Explore the Main River Isle

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

European eel Stone loach Minnow Chub Dace 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 →