Ruffe · Gymnocephalus cernuus

Ruffe in the Fossdyke Navigation Canal

Largest measured ruffe: 13.8 cm

The largest ruffe measured in Environment Agency surveys of the Fossdyke Navigation Canal was 13.8 cm, recorded at Pyewipe Inn on 12 September 1991.

Across 4,061 measured ruffe, the median measured length was 8.1 cm.

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

See ruffe records across England →

Most recent observation9 May 2017Fertilizer Factory · 24 fish

Largest measured ruffe: 13.8 cm
Median length: 8.1 cm
Fish measured: 4,061
Survey locations: 5

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
13.8 cm	12 Sept 1991	Pyewipe Inn	53219
13.7 cm	10 Aug 1988	Hardwick Ferry L/B	53114
13.7 cm	28 Jun 1985	Pyewipe Inn	53018
13.5 cm	12 Aug 1988	Fertilizer Factory	53116
13.5 cm	28 Jun 1985	Pyewipe Inn	53018
13.4 cm	28 Jun 1985	Pyewipe Inn	53018
13.2 cm	11 Sept 1991	Burton Lane End (Burton Waters)	53218
12.6 cm	29 Aug 1991	Hardwick Ferry L/B	53215
12.5 cm	12 Sept 1991	Pyewipe Inn	53219
12.5 cm	10 Aug 1988	Hardwick Ferry L/B	53114

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
Fertilizer Factory	26 Jun 1985	9 May 2017	18
Hardwick Ferry L/B	6 Jun 1985	27 Jun 2006	10
Pyewipe Inn	28 Jun 1985	20 Aug 1997	5
Burton Lane End (Burton Waters)	27 Jun 1985	19 Aug 1997	5
Drinsey Nook R/B	25 Jun 1985	12 Aug 1997	5

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

1985–2017

Survey records by year

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

585

086

087

588

089

090

591

092

093

594

095

096

597

098

099

000

001

202

203

204

205

206

107

108

109

110

111

112

013

114

015

016

117

Fish measured by surveyors

Measured length distribution

See how the 4,061 measured fish were spread across different length ranges.

Smallest: 3.2 cm
Lower quarter: 6.4 cm
Median: 8.1 cm
Upper quarter: 9.1 cm
Largest: 13.8 cm

0–99 mm

3681

100–199 mm

380

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Fossdyke Navigation Canal

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

Common bream Perch Roach Pike Bleak 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 →