Roach · Rutilus rutilus

Roach in the River Derwent

Largest measured roach: 32.5 cm

The largest roach measured in Environment Agency surveys of the River Derwent was 32.5 cm, recorded at Cromford on 26 February 1998.

Across 2,214 measured roach, the median measured length was 12.4 cm.

Surveyors recorded one individual weight: 8.5 oz (0.24 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 Derwent.

See roach records across England →

Most recent observation25 July 2017Chub Alley · 6 fish

Largest measured roach: 32.5 cm
Median length: 12.4 cm
Fish measured: 2,214
Survey locations: 10

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
32.5 cm	26 Feb 1998	Cromford	23972
29.2 cm	22 Apr 1993	Alvaston	25698
29 cm	22 Apr 1993	Alvaston	25698
28.7 cm	16 Sept 2004	Cromford	82359
28.1 cm	22 Apr 1993	Alvaston	25698
26.5 cm	29 Aug 1994	Church Wilne	25181
26.1 cm	22 Apr 1993	Alvaston	25698
25.9 cm	28 Apr 1993	Church Wilne	25697
25 cm	6 Sept 2009	Borrowash	119552
24.5 cm	29 Aug 1994	Church Wilne	25181

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
Chub Alley	17 Sept 2014	25 Jul 2017	2
Nooning Lane	1 Jul 2010	17 Sept 2014	2
Borrowash	14 Oct 2001	1 Sept 2013	8
Chub Alley Net	29 Sept 2010	3 Aug 2012	2
Nooning Lane Net	29 Sept 2010	29 Sept 2010	1
Cromford	26 Feb 1998	28 Jul 2009	3
Duffield	10 Feb 1998	2 Nov 2008	6
Church Wilne	28 Apr 1993	5 Oct 2008	9
Matlock Bath	29 Jul 2001	5 Sept 2004	3
Alvaston	22 Apr 1993	17 Feb 1998	2

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

1993–2017

Survey records by year

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

293

194

095

096

097

398

099

000

401

302

003

504

205

206

307

308

209

310

011

112

113

214

015

016

117

Fish measured by surveyors

Measured length distribution

See how the 2,214 measured fish were spread across different length ranges.

Smallest: 3.4 cm
Lower quarter: 10.9 cm
Median: 12.4 cm
Upper quarter: 14.3 cm
Largest: 32.5 cm

0–99 mm

231

100–199 mm

1899

200–299 mm

300–399 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

One individual weight was recorded for this fish and river. This is a subset of the measured fish and may not represent the whole population.

Recorded weight: 8.5 oz (0.24 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 Derwent

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

Brown / sea trout Bullhead Minnow Grayling Chub Stone loach

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 →