Ruffe · Gymnocephalus cernuus

Ruffe in the River Tas

Largest measured ruffe: 16 cm

The largest ruffe measured in Environment Agency surveys of the River Tas was 16 cm, recorded at Markshall Bridge on 6 April 1987.

Across 17 measured ruffe, the median measured length was 11.4 cm.

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

See ruffe records across England →

Most recent observation27 April 2005CEGB Trowse · 13 fish

Largest measured ruffe: 16 cm
Median length: 11.4 cm
Fish measured: 17
Survey locations: 3

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
16 cm	6 Apr 1987	Markshall Bridge	17415
14.5 cm	27 Apr 2005	CEGB Trowse	84615
14.1 cm	27 Apr 2005	CEGB Trowse	84615
14.1 cm	27 Apr 2005	CEGB Trowse	84615
13.4 cm	27 Apr 2005	CEGB Trowse	84615
13.4 cm	27 Apr 2005	CEGB Trowse	84615
12.7 cm	27 Apr 2005	CEGB Trowse	84615
12.4 cm	8 Apr 1987	CEGB Trowse	17416
11.4 cm	27 Apr 2005	CEGB Trowse	84615
11.4 cm	27 Apr 2005	CEGB Trowse	84615

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
CEGB Trowse	8 Apr 1987	27 Apr 2005	2
Upstream Hempnall Beck	22 Apr 2005	22 Apr 2005	1
Markshall Bridge	6 Apr 1987	6 Apr 1987	1

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

1987–2005

Survey records by year

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

287

088

089

090

091

092

093

094

095

096

097

098

099

000

001

002

003

004

205

Fish measured by surveyors

Measured length distribution

See how the 17 measured fish were spread across different length ranges.

Smallest: 5.6 cm
Lower quarter: 6.8 cm
Median: 11.4 cm
Upper quarter: 13.4 cm
Largest: 16 cm

0–99 mm

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Tas

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

European eel Stone loach Roach Bullhead Dace 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 →