RiverFish

Roach · Rutilus rutilus

Roach in the River Test

Largest measured roach: 36.8 cm

The largest roach measured in Environment Agency surveys of the River Test was 36.8 cm, recorded at Mottisfont Abbey, Oakley carrier on 19 August 2010.

Across 722 measured roach, the median measured length was 13.3 cm.

Surveyors recorded weights for 374 roach. The median was 1.3 oz (0.036 kg) and the largest recorded weight was 1 lb 11.4 oz (0.778 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 Test.

See roach records across England →

Most recent observation22 August 2025Romsey War Memorial Park · 15 fish
Largest measured roach
36.8 cm
Median length
13.3 cm
Fish measured
722
Survey locations
13

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
36.8 cm19 Aug 2010Mottisfont Abbey, Oakley carrier123822
35.8 cm19 Aug 2010Mottisfont Abbey, Oakley carrier123822
35.8 cm19 Aug 2010Mottisfont Abbey, Oakley carrier123822
35.3 cm19 Aug 2010Mottisfont Abbey, Oakley carrier123822
35.2 cm19 Aug 2010Mottisfont Abbey, Oakley carrier123822
34.3 cm28 Aug 2004Romsey Canal80730
33.3 cm19 Aug 2010Mottisfont Abbey, Oakley carrier123822
33 cm18 Jul 2018Romsey World of Water152938
33 cm17 Apr 2014Romsey Canal140734
31.6 cm19 Aug 2010Mottisfont Abbey, Oakley carrier123822

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
Romsey War Memorial Park14 Nov 200322 Aug 202512
Romsey Canal3 Sept 200214 Sept 202313
Romsey World of Water18 Jul 201818 Jul 20181
Fish Lake23 Sept 200215 Jul 20146
Timsbury Mayfly carrier u/s of bridge10 Jul 20128 Jul 20142
Fairbourne stream, Brook Farm8 Jul 20148 Jul 20141
Red River Carrier, Broadlands15 Aug 200814 Jun 20132
Romsey Canal Railway Bridge18 Apr 201318 Apr 20131
Freefolk Piscatorial5 Oct 20125 Oct 20121
Mottisfont Abbey, Oakley carrier15 Jul 200419 Aug 20102
Timsbury Manor Carrier24 Sept 20029 Aug 20065
Saddlers Mill26 Aug 200426 Aug 20041
Mottisfont, Oakley Farm15 Jul 200415 Jul 20041

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

2002–2025

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 722 measured fish were spread across different length ranges.

Smallest
3.3 cm
Lower quarter
10.3 cm
Median
13.3 cm
Upper quarter
18 cm
Largest
36.8 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 374 roach. This is a subset of the measured fish and may not represent the whole population.

Lightest
0.1 oz (0.002 kg)
Lower quarter
0.8 oz (0.022 kg)
Median
1.3 oz (0.036 kg)
Upper quarter
2.1 oz (0.06 kg)
Heaviest
1 lb 11.4 oz (0.778 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 Test

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

Brown / sea trout European eel Bullhead Minnow Stone loach Grayling

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 →