Ruffe · Gymnocephalus cernuus

Ruffe in the Trader/Maud Foster Drain

Largest measured ruffe: 13.6 cm

The largest ruffe measured in Environment Agency surveys of the Trader/Maud Foster Drain was 13.6 cm, recorded at Trader Bank Sibsey on 7 May 2013.

Across 3,633 measured ruffe, the median measured length was 7.4 cm.

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the Trader/Maud Foster Drain.

See ruffe records across England →

Most recent observation1 May 2019Upstream Boston Golf Club · 1 fish

Largest measured ruffe: 13.6 cm
Median length: 7.4 cm
Fish measured: 3,633
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
13.6 cm	7 May 2013	Trader Bank Sibsey	135982
13.5 cm	9 Jun 2009	Upstream Boston Golf Club	117927
13.2 cm	9 May 2013	Horncastle Road	136068
13.2 cm	10 Jun 1987	Trader Bank Sibsey	58201
13.2 cm	9 Jun 1987	Sibsey Fenside	58202
13.1 cm	14 Jun 2010	Windsor Bank Boston	124194
13.1 cm	19 Jun 2007	Windsor Bank Boston	105683
13.1 cm	25 May 2006	Horncastle Road	99806
12.8 cm	24 May 2006	Trader Bank Sibsey	99825
12.7 cm	24 May 2005	Horncastle Road	84591

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
Upstream Boston Golf Club	3 Jun 1987	1 May 2019	13
Trader Bank Sibsey	10 Jun 1987	30 Apr 2019	18
Horncastle Road	12 Jun 1996	10 May 2016	13
Windsor Bank Boston	13 Jun 1996	14 Jun 2010	6
Sibsey Fenside	9 Jun 1987	23 May 2000	5

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

1987–2019

Survey records by year

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

387

088

089

390

091

092

393

094

095

596

097

098

099

500

001

202

203

204

205

206

407

408

409

410

211

012

313

014

015

316

017

018

219

Fish measured by surveyors

Measured length distribution

See how the 3,633 measured fish were spread across different length ranges.

Smallest: 4 cm
Lower quarter: 6.6 cm
Median: 7.4 cm
Upper quarter: 8.3 cm
Largest: 13.6 cm

0–99 mm

3345

100–199 mm

288

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Trader/Maud Foster Drain

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

Common bream Roach Perch Pike 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 →