RiverFish

Roach · Rutilus rutilus

Roach in the Great Raveley Drain

Largest measured roach: 21.5 cm

The largest roach measured in Environment Agency surveys of the Great Raveley Drain was 21.5 cm, recorded at Woodwalton Fen on 28 June 2023.

Across 3,483 measured roach, the median measured length was 7.8 cm.

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

See roach records across England →

Most recent observation28 June 2023Woodwalton Fen · 168 fish
Largest measured roach
21.5 cm
Median length
7.8 cm
Fish measured
3,483
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
21.5 cm28 Jun 2023Woodwalton Fen162466
20.3 cm9 Jun 1999Woodwalton Fen29728
19.3 cm9 Jun 1999Woodwalton Fen29728
19.3 cm15 Jul 1994Speed The Plough Bridge29725
19.2 cm17 Jun 2011Woodwalton Fen126577
18.8 cm10 Jun 1999Speed The Plough Bridge29727
18.5 cm17 Jun 2011Woodwalton Fen126577
18.3 cm9 Jun 1999Woodwalton Fen29728
18.3 cm9 Jun 1999Woodwalton Fen29728
18.3 cm15 Jul 1994Speed The Plough Bridge29725

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
Woodwalton Fen10 Jul 199128 Jun 20236
Speed The Plough Bridge12 Jul 199110 Jun 19993

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

1991–2023

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 3,483 measured fish were spread across different length ranges.

Smallest
2.8 cm
Lower quarter
6.8 cm
Median
7.8 cm
Upper quarter
9.8 cm
Largest
21.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Great Raveley Drain

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

Bleak Perch Silver bream Common bream Rudd Ruffe

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 →