RiverFish

Roach · Rutilus rutilus

Roach in the Swavesey Drain

Largest measured roach: 15.4 cm

The largest roach measured in Environment Agency surveys of the Swavesey Drain was 15.4 cm, recorded at US Webs Hole Sluice on 2 May 2013.

Across 214 measured roach, the median measured length was 4.8 cm.

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

See roach records across England →

Most recent observation20 May 2026US Webs Hole Sluice · 22 fish
Largest measured roach
15.4 cm
Median length
4.8 cm
Fish measured
214
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.

LengthSurvey dateSurvey locationSurvey ID
15.4 cm2 May 2013US Webs Hole Sluice135942
11.7 cm20 May 2026US Webs Hole Sluice181635
11.2 cm20 May 2026US Webs Hole Sluice181635
11 cm20 May 2026US Webs Hole Sluice181635
10.5 cm20 May 2026US Webs Hole Sluice181635
10.4 cm20 May 2026US Webs Hole Sluice181635
10 cm2 May 2013US Webs Hole Sluice135942
9.7 cm20 May 2026US Webs Hole Sluice181635
8.9 cm2 May 2013US Webs Hole Sluice135942
8.7 cm20 May 2026US Webs Hole Sluice181635

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 surveyedFirst recordedLast recordedVisits finding roach
US Webs Hole Sluice18 Apr 200520 May 20263
Swavesey Drain (Eel Monitoring)2 May 20132 May 20131
DS Webs Hole Sluice18 Apr 200518 Apr 20051

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

2005–2026

Survey records by year

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

Fish measured by surveyors

Measured length distribution

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

Smallest
2.8 cm
Lower quarter
4.5 cm
Median
4.8 cm
Upper quarter
5.3 cm
Largest
15.4 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Swavesey Drain

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

Dace Perch Tench Common bream European eel

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 →