Ruffe · Gymnocephalus cernuus

Ruffe in the Kings Dyke

Largest measured ruffe: 14.3 cm

The largest ruffe measured in Environment Agency surveys of the Kings Dyke was 14.3 cm, recorded at Ashline Lock on 18 June 1991.

Across 327 measured ruffe, the median measured length was 8.3 cm.

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

See ruffe records across England →

Most recent observation23 June 2006Horsey Toll · 42 fish

Largest measured ruffe: 14.3 cm
Median length: 8.3 cm
Fish measured: 327
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.

Length	Survey date	Survey location	Survey ID
14.3 cm	18 Jun 1991	Ashline Lock	29579
13.3 cm	18 Jun 1991	Ashline Lock	29579
13.3 cm	18 Jun 1991	Ashline Lock	29579
13.3 cm	18 Jun 1991	Ashline Lock	29579
13.3 cm	18 Jun 1991	Ashline Lock	29579
12.8 cm	25 Jun 1991	Whittlesey	29578
12.8 cm	11 May 1987	Horsey Toll	29568
12.3 cm	21 May 1999	Horsey Toll	29584
12.3 cm	25 Jun 1991	Whittlesey	29578
12.3 cm	25 Jun 1991	Whittlesey	29578

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 surveyed	First recorded	Last recorded	Visits finding ruffe
Horsey Toll	11 May 1987	23 Jun 2006	5
Whittlesey	13 May 1987	22 Jun 2006	5
Fields End Bridge	17 Apr 1990	14 May 1999	4
Ashline Lock	20 Apr 1990	22 Jun 1994	3

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

1987–2006

Survey records by year

Each bar shows how many survey visits recorded ruffe that year.

287

088

089

490

391

092

093

494

095

096

097

098

299

000

001

002

003

004

005

206

Fish measured by surveyors

Measured length distribution

See how the 327 measured fish were spread across different length ranges.

Smallest: 6.3 cm
Lower quarter: 7.3 cm
Median: 8.3 cm
Upper quarter: 10.3 cm
Largest: 14.3 cm

0–99 mm

235

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Kings Dyke

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

Perch Pike Roach Common bream Silver bream Bleak

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 →