RiverFish

Ruffe · Gymnocephalus cernuus

Ruffe in the River DS Cam

Largest measured ruffe: 14.8 cm

The largest ruffe measured in Environment Agency surveys of the River DS Cam was 14.8 cm, recorded at Horningsea on 18 January 1989.

Across 850 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 River DS Cam.

See ruffe records across England →

Most recent observation30 September 2025Fen Ditton · 3 fish
Largest measured ruffe
14.8 cm
Median length
7.8 cm
Fish measured
850
Survey locations
11

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
14.8 cm18 Jan 1989Horningsea29349
13.8 cm23 Jan 1989Commissioners Farm29352
13.8 cm19 Jan 1989Clayhithe Bridge29350
13.8 cm19 Jan 1989Clayhithe Bridge29350
13.5 cm17 Sept 2002Fen Ditton61780
13.3 cm26 May 1993Hatleys Wash29379
13.3 cm19 Jan 1989Clayhithe Bridge29350
13.3 cm18 Jan 1989Horningsea29349
13.3 cm18 Jan 1989Horningsea29349
13 cm24 Aug 2006Baits Bite Lock100953

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
Fen Ditton16 Jan 198830 Sept 202513
Midsummer Common12 Jan 198925 Sept 202513
DS Upware7 Feb 20237 Feb 20231
Ducketts Farm Upware1 Feb 198919 Aug 20164
Dimmocks Cote2 Feb 19896 Sept 20139
Stourbridge Common13 Jan 19898 Aug 20115
Baits Bite Lock17 Jan 198912 Sept 20088
Commissioners Farm23 Jan 19891 Nov 19964
Horningsea18 Jan 198916 Oct 19964
Hatleys Wash30 Jan 198926 May 19933
Clayhithe Bridge19 Jan 198925 May 19933

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

1988–2025

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 850 measured fish were spread across different length ranges.

Smallest
3.8 cm
Lower quarter
6.3 cm
Median
7.8 cm
Upper quarter
9.8 cm
Largest
14.8 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River DS Cam

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

Perch Pike Common bream Roach Dace Gudgeon

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 →