Ruffe · Gymnocephalus cernuus

Ruffe in the River Thame

Largest measured ruffe: 12.7 cm

The largest ruffe measured in Environment Agency surveys of the River Thame was 12.7 cm, recorded at Chiselhampton on 10 October 2005.

Across 20 measured ruffe, the median measured length was 8.9 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 Thame.

See ruffe records across England →

Most recent observation21 September 2010Dorchester Road Bridge · 5 fish

Largest measured ruffe: 12.7 cm
Median length: 8.9 cm
Fish measured: 20
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
12.7 cm	10 Oct 2005	Chiselhampton	86732
12.6 cm	24 Sept 2008	Waterstock Mill	114959
12.3 cm	30 Sept 2005	Cuddesdon	86608
11.2 cm	28 Sept 2005	Waterstock Mill	87351
9.6 cm	12 Sept 2006	Waterstock Mill	101347
9.3 cm	19 Sept 2003	Cuddesdon	77190
9.2 cm	1 Sept 2010	Waterstock Mill	124921
9.1 cm	20 Sept 2004	Waterstock Mill	82524
9 cm	21 Sept 2010	Dorchester Road Bridge	124893
9 cm	1 Sept 2010	Waterstock Mill	124921

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
Dorchester Road Bridge	22 Sept 2004	21 Sept 2010	2
Waterstock Mill	20 Sept 2004	1 Sept 2010	5
Chiselhampton	10 Oct 2005	10 Oct 2005	1
Cuddesdon	19 Sept 2003	30 Sept 2005	2

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

2003–2010

Survey records by year

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

103

204

305

106

007

108

009

210

Fish measured by surveyors

Measured length distribution

See how the 20 measured fish were spread across different length ranges.

Smallest: 7.3 cm
Lower quarter: 8.2 cm
Median: 9 cm
Upper quarter: 9.4 cm
Largest: 12.7 cm

0–99 mm

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Thame

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

Chub Roach Gudgeon Dace Perch Pike

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 →