RiverFish

Ruffe · Gymnocephalus cernuus

Ruffe in the River Thurne (Seine)

Largest measured ruffe: 15.6 cm

The largest ruffe measured in Environment Agency surveys of the River Thurne (Seine) was 15.6 cm, recorded at Upstream Potter Bridge on 7 October 1993.

Across 145 measured ruffe, the median measured length was 12.3 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 Thurne (Seine).

See ruffe records across England →

Most recent observation7 October 1993Upstream Potter Bridge · 133 fish
Largest measured ruffe
15.6 cm
Median length
12.3 cm
Fish measured
145
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.

LengthSurvey dateSurvey locationSurvey ID
15.6 cm7 Oct 1993Upstream Potter Bridge16905
14.4 cm7 Oct 1993Upstream Potter Bridge16905
14.3 cm7 Oct 1993Upstream Potter Bridge16905
14.3 cm7 Oct 1993Upstream Potter Bridge16905
14.2 cm7 Oct 1993Upstream Potter Bridge16905
14.2 cm7 Oct 1993Upstream Potter Bridge16905
14.2 cm7 Oct 1993Upstream Potter Bridge16905
14.2 cm7 Oct 1993Upstream Potter Bridge16905
14.1 cm7 Oct 1993Upstream Potter Bridge16905
14.1 cm7 Oct 1993Upstream Potter Bridge16905

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
Upstream Potter Bridge7 Oct 19937 Oct 19931
Upstream Martham Ferry8 Sept 19868 Sept 19861
Upstream Candle Dyke23 Aug 198623 Aug 19861
Downstream Womack Water18 Aug 198618 Aug 19861

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

1986–1993

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 145 measured fish were spread across different length ranges.

Smallest
5.7 cm
Lower quarter
11.1 cm
Median
12.3 cm
Upper quarter
13.1 cm
Largest
15.6 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Thurne (Seine)

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

Roach Flounder Perch Common bream Smelt 3-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 →