RiverFish

Roach · Rutilus rutilus

Roach in the River Darent

Largest measured roach: 46.5 cm

The largest roach measured in Environment Agency surveys of the River Darent was 46.5 cm, recorded at Horton Kirby on 13 July 2004.

Across 4,932 measured roach, the median measured length was 11.1 cm.

Surveyors recorded weights for 122 roach. The median was 1.2 oz (0.035 kg) and the largest recorded weight was 6.1 oz (0.173 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 Darent.

See roach records across England →

Most recent observation22 July 2026Twitton Brook · 63 fish
Largest measured roach
46.5 cm
Median length
11.1 cm
Fish measured
4,932
Survey locations
9

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
46.5 cm13 Jul 2004Horton Kirby82590
30.8 cm5 Oct 2011Twitton Brook128592
30.2 cm1 May 2019Lullingstone154448
26.8 cm5 Oct 2011Twitton Brook128592
26.6 cm1 May 2019Lullingstone154448
26.3 cm1 Sept 2003Acacia Hall77015
26 cm28 Apr 2015Dartford Park144625
25.7 cm13 Jul 2004Horton Kirby82590
25.6 cm28 Apr 2015Dartford Park144625
25.5 cm20 Apr 2022Lullingstone160908

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
Twitton Brook26 Aug 200322 Jul 202616
Hawley Hall1 Jun 20111 Jul 20267
Preston Farm4 Sept 200211 Jun 202613
Lullingstone13 Sept 200710 Jun 202611
Horton Kirby13 Jun 200114 May 202618
Dartford Park5 Aug 20024 Jun 20249
Sevenoaks Wildfowl Reserve5 Aug 200922 May 20249
Sundridge3 May 20223 May 20221
Acacia Hall1 Sept 200328 Aug 20097

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

2001–2026

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 4,932 measured fish were spread across different length ranges.

Smallest
2.3 cm
Lower quarter
7.8 cm
Median
11.1 cm
Upper quarter
14.4 cm
Largest
46.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 122 roach. This is a subset of the measured fish and may not represent the whole population.

Lightest
0 oz (0.001 kg)
Lower quarter
0.3 oz (0.008 kg)
Median
1.2 oz (0.035 kg)
Upper quarter
2.5 oz (0.0715 kg)
Heaviest
6.1 oz (0.173 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 Darent

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

Gudgeon Bullhead Perch Brown / sea trout Stone loach Pike

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 →