RiverFish

Ruffe · Gymnocephalus cernuus

Ruffe in the River Swale

Largest measured ruffe: 14.2 cm

The largest ruffe measured in Environment Agency surveys of the River Swale was 14.2 cm, recorded at Myton Grange on 24 July 2025.

Across 25 measured ruffe, the median measured length was 6.2 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 Swale.

See ruffe records across England →

Most recent observation24 July 2025Myton Grange · 9 fish
Largest measured ruffe
14.2 cm
Median length
6.2 cm
Fish measured
25
Survey locations
10

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
14.2 cm24 Jul 2025Myton Grange177532
13.8 cm19 Jul 2017Brafferton150963
13.7 cm24 Jul 2025Myton Grange177532
10.7 cm12 Aug 2003u/s Topcliffe Weir (Gill Net)77847
9.8 cm31 Jul 2006Myton Grange101065
8.2 cm22 Jul 1997Catton110590
8.2 cm25 Jun 1996Holme110496
8.2 cm25 Jun 1996Holme110496
8 cm9 Aug 2006Morton-on-Swale101078
7.8 cm25 Jun 1996Skipton-on-Swale110453

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
Myton Grange31 Jul 200624 Jul 20252
Brafferton19 Jul 201719 Jul 20171
Maunby Demesne Upper Site8 Jul 20148 Jul 20141
Morton-on-Swale9 Aug 20069 Aug 20061
u/s Topcliffe Weir (Gill Net)12 Aug 200312 Aug 20031
u/s Topcliffe Weir (Electric Fishing)12 Aug 200312 Aug 20031
Catton22 Jul 199722 Jul 19971
Skipton-on-Swale25 Jun 199625 Jun 19961
Holme25 Jun 199625 Jun 19961
Thornton Bridge - Fry Survey20 Sept 198419 Sept 19953

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

1984–2025

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 25 measured fish were spread across different length ranges.

Smallest
2.4 cm
Lower quarter
3.9 cm
Median
6.2 cm
Upper quarter
8.2 cm
Largest
14.2 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Swale

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

Minnow Chub Bullhead Stone loach Dace Grayling

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 →