RiverFish

Roach · Rutilus rutilus

Roach in the River Staines

Largest measured roach: 16.6 cm

The largest roach measured in Environment Agency surveys of the River Staines was 16.6 cm, recorded at Staines Upstream Fry on 18 August 2010.

Across 1,363 measured roach, the median measured length was 3.8 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 Staines.

See roach records across England →

Most recent observation3 September 2025Staines Upstream Fry · 24 fish
Largest measured roach
16.6 cm
Median length
3.8 cm
Fish measured
1,363
Survey locations
2

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
16.6 cm18 Aug 2010Staines Upstream Fry124730
16.4 cm25 Aug 2016Staines Downstream Fry149237
14.1 cm25 Aug 2016Staines Downstream Fry149237
14 cm18 Aug 2010Staines Upstream Fry124730
13.7 cm20 Aug 2008Staines Downstream Fry125754
13.2 cm18 Aug 2010Staines Upstream Fry124730
12.7 cm22 Aug 2007Staines Downstream Fry108628
12.2 cm31 Aug 2005Staines Upstream Fry111821
12.2 cm31 Aug 2005Staines Upstream Fry111821
11.6 cm31 Aug 2005Staines Upstream Fry111821

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
Staines Upstream Fry9 Sept 20043 Sept 202517
Staines Downstream Fry9 Sept 200420 Aug 202415

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

2004–2025

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 1,363 measured fish were spread across different length ranges.

Smallest
2.1 cm
Lower quarter
3.4 cm
Median
3.8 cm
Upper quarter
4.5 cm
Largest
16.6 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Staines

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

Dace Gudgeon Chub Minnow Bleak Perch

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 →