RiverFish

Ruffe · Gymnocephalus cernuus

Ruffe in the Great Raveley Drain

Largest measured ruffe: 11.8 cm

The largest ruffe measured in Environment Agency surveys of the Great Raveley Drain was 11.8 cm, recorded at Speed The Plough Bridge on 10 June 1999.

Across 126 measured ruffe, the median measured length was 6.8 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 ruffe records across England →

Most recent observation28 June 2023Woodwalton Fen · 1 fish
Largest measured ruffe
11.8 cm
Median length
6.8 cm
Fish measured
126
Survey locations
2

Individual EA measurements

Largest measured ruffe

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

LengthSurvey dateSurvey locationSurvey ID
11.8 cm10 Jun 1999Speed The Plough Bridge29727
11.3 cm10 Jun 1999Speed The Plough Bridge29727
11.3 cm9 Jun 1999Woodwalton Fen29728
10.8 cm10 Jun 1999Speed The Plough Bridge29727
10.3 cm10 Jun 1999Speed The Plough Bridge29727
10.3 cm10 Jun 1999Speed The Plough Bridge29727
10.3 cm14 Jul 1994Woodwalton Fen29726
10.3 cm14 Jul 1994Woodwalton Fen29726
10.1 cm28 Jun 2023Woodwalton Fen162466
9.8 cm9 Jun 1999Woodwalton Fen29728

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

Explore the river

Where ruffe were found

Each point marks a survey location with at least one ruffe 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 ruffe
Woodwalton Fen14 Jul 199428 Jun 20234
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 ruffe that year.

Fish measured by surveyors

Measured length distribution

See how the 126 measured fish were spread across different length ranges.

Smallest
5.3 cm
Lower quarter
6.3 cm
Median
6.8 cm
Upper quarter
7.8 cm
Largest
11.8 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 Roach Silver bream Common bream Rudd

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 →