RiverFish

Perch · Perca fluviatilis

Perch in the Great Raveley Drain

Largest measured perch: 36.5 cm

The largest perch measured in Environment Agency surveys of the Great Raveley Drain was 36.5 cm, recorded at Woodwalton Fen on 30 May 2006.

Across 924 measured perch, 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 perch records across England →

Most recent observation28 June 2023Woodwalton Fen · 116 fish
Largest measured perch
36.5 cm
Median length
7.8 cm
Fish measured
924
Survey locations
2

Individual EA measurements

Largest measured perch

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

LengthSurvey dateSurvey locationSurvey ID
36.5 cm30 May 2006Woodwalton Fen90910
33.3 cm15 Jul 1994Speed The Plough Bridge29725
19.5 cm30 May 2006Woodwalton Fen90910
17.4 cm17 Jun 2011Woodwalton Fen126577
17.1 cm17 Jun 2011Woodwalton Fen126577
16.8 cm10 Jun 1999Speed The Plough Bridge29727
16.3 cm14 Jul 1994Woodwalton Fen29726
15.3 cm9 Jun 1999Woodwalton Fen29728
15.3 cm15 Jul 1994Speed The Plough Bridge29725
14.3 cm15 Jul 1994Speed The Plough Bridge29725

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where perch were found

Each point marks a survey location with at least one perch 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 perch
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 perch that year.

Fish measured by surveyors

Measured length distribution

See how the 924 measured fish were spread across different length ranges.

Smallest
4.3 cm
Lower quarter
7.3 cm
Median
7.8 cm
Upper quarter
8.4 cm
Largest
36.5 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 Roach 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 →