Roach · Rutilus rutilus

Roach in the River Bulbourne

Largest measured roach: 30.5 cm

The largest roach measured in Environment Agency surveys of the River Bulbourne was 30.5 cm, recorded at Boxmoor u/s on 24 April 2015.

Across 358 measured roach, the median measured length was 10.8 cm.

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

See roach records across England →

Most recent observation14 May 2019Boxmoor d/s · 6 fish

Largest measured roach: 30.5 cm
Median length: 10.8 cm
Fish measured: 358
Survey locations: 3

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
30.5 cm	24 Apr 2015	Boxmoor u/s	144597
28.5 cm	24 Apr 2015	Boxmoor u/s	144597
25.1 cm	24 Apr 2015	Boxmoor d/s	144601
24.3 cm	11 Apr 2011	Station Moor	126087
24.3 cm	11 Apr 2011	Station Moor	126087
23.5 cm	11 Apr 2011	Station Moor	126087
20.5 cm	11 Apr 2011	Station Moor	126087
20.2 cm	24 Apr 2015	Boxmoor u/s	144597
19.9 cm	29 Apr 2016	Boxmoor u/s	148001
19.8 cm	29 Apr 2016	Boxmoor d/s	148002

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
Boxmoor u/s	24 Apr 2015	14 May 2019	6
Boxmoor d/s	24 Apr 2015	14 May 2019	5
Station Moor	11 Apr 2011	11 Apr 2011	1

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

2011–2019

Survey records by year

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

111

012

013

014

215

216

217

318

219

Fish measured by surveyors

Measured length distribution

See how the 358 measured fish were spread across different length ranges.

Smallest: 3 cm
Lower quarter: 8.3 cm
Median: 10.9 cm
Upper quarter: 14.3 cm
Largest: 30.5 cm

0–99 mm

140

100–199 mm

210

200–299 mm

300–399 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Bulbourne

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

Perch Chub Dace Pike Gudgeon Bleak

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 →