Ruffe · Gymnocephalus cernuus

Ruffe in the Jubilee River

Largest measured ruffe: 11 cm

The largest ruffe measured in Environment Agency surveys of the Jubilee River was 11 cm, recorded at Eton Far Shore on 26 August 2009.

Across 293 measured ruffe, the median measured length was 4.6 cm.

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

See ruffe records across England →

Most recent observation23 August 2013Upstream of Slough Weir · 1 fish

Largest measured ruffe: 11 cm
Median length: 4.6 cm
Fish measured: 293
Survey locations: 6

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
11 cm	26 Aug 2009	Eton Far Shore	118860
10.9 cm	25 Aug 2009	Taplow	118644
10.5 cm	27 Aug 2008	Black Potts	114195
9.9 cm	25 Aug 2009	Taplow	118644
9.9 cm	26 Aug 2008	Conservation Section No 1 (DS)	114164
9.7 cm	27 Aug 2008	Eton Far Shore	114207
9.6 cm	27 Aug 2008	Eton Far Shore	114207
9.6 cm	27 Aug 2008	Black Potts	114195
9.4 cm	21 Aug 2013	Conservation Section No 2 (US)	138210
9.1 cm	27 Aug 2008	Eton Far Shore	114207

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 of Slough Weir	26 Aug 2009	23 Aug 2013	2
Black Potts	31 Aug 2004	22 Aug 2013	6
Conservation Section No 2 (US)	1 Sept 2004	21 Aug 2013	5
Conservation Section No 1 (DS)	1 Sept 2004	21 Aug 2013	6
Eton Far Shore	14 Aug 2006	26 Aug 2009	4
Taplow	20 Aug 2003	25 Aug 2009	4

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

2003–2013

Survey records by year

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

103

304

205

306

507

508

409

010

011

012

413

Fish measured by surveyors

Measured length distribution

See how the 293 measured fish were spread across different length ranges.

Smallest: 2.1 cm
Lower quarter: 3.6 cm
Median: 4.6 cm
Upper quarter: 5.8 cm
Largest: 11 cm

0–99 mm

290

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Jubilee River

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

3-spined stickleback Gudgeon Perch Stone loach Roach 10-spined stickleback

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 →