RiverFish

Ruffe · Gymnocephalus cernuus

Ruffe in the Whittlesey Dyke

Largest measured ruffe: 13.8 cm

The largest ruffe measured in Environment Agency surveys of the Whittlesey Dyke was 13.8 cm, recorded at Ashline Lock on 15 May 1987.

Across 462 measured ruffe, 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 Whittlesey Dyke.

See ruffe records across England →

Most recent observation12 July 2023Ashline Lock · 1 fish
Largest measured ruffe
13.8 cm
Median length
7.8 cm
Fish measured
462
Survey locations
4

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
13.8 cm15 May 1987Ashline Lock29753
13.3 cm27 Jun 1991Angle Corner Bridge29758
12.8 cm27 Jun 1991Angle Corner Bridge29758
12.3 cm27 Jun 1991Angle Corner Bridge29758
12.3 cm27 Jun 1991Angle Corner Bridge29758
12.3 cm5 Jun 1987Burnthouse Bridge29756
12.3 cm21 May 1987Angle Corner Bridge29754
11.8 cm5 Jul 1994Burnthouse Bridge29764
11.8 cm1 Jul 1991Burnthouse Bridge29760
11.8 cm1 Jul 1991Burnthouse Bridge29760

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
Ashline Lock15 May 198712 Jul 20237
Angle Corner Bridge21 May 19873 Jun 19994
Burnthouse Bridge5 Jun 19875 Jul 19943
Engine Farm1 Jun 198730 Jun 19943

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

1987–2023

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 462 measured fish were spread across different length ranges.

Smallest
5.3 cm
Lower quarter
7.3 cm
Median
7.8 cm
Upper quarter
9.3 cm
Largest
13.8 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Whittlesey Dyke

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

Common bream Perch Pike Roach Tench Silver bream

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 →