RiverFish

Ruffe · Gymnocephalus cernuus

Ruffe in the King's Sedgemoor Drain

Largest measured ruffe: 11 cm

The largest ruffe measured in Environment Agency surveys of the King's Sedgemoor Drain was 11 cm, recorded at u/s Greylake sluice on 25 April 2007.

Across 39 measured ruffe, the median measured length was 7.5 cm.

Surveyors recorded weights for 13 ruffe. The median was 0.3 oz (0.008 kg) and the largest recorded weight was 0.5 oz (0.015 kg).

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the King's Sedgemoor Drain.

See ruffe records across England →

Most recent observation13 April 2022d/s Greylake sluice · 4 fish
Largest measured ruffe
11 cm
Median length
7.5 cm
Fish measured
39
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.

LengthSurvey dateSurvey locationSurvey ID
11 cm25 Apr 2007u/s Greylake sluice105174
10 cm24 Apr 2007d/s Greylake sluice105267
9.5 cm13 Apr 2022d/s Greylake sluice160906
9.4 cm24 Apr 2007d/s Greylake sluice105267
9.1 cm24 Apr 2007d/s Greylake sluice105267
9 cm7 Sept 2011u/s Parchey127756
9 cm24 Apr 2007d/s Greylake sluice105267
9 cm24 Apr 2007d/s Greylake sluice105267
8.9 cm13 Apr 2022d/s Greylake sluice160906
8.9 cm24 Apr 2007d/s Greylake sluice105267

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
d/s Greylake sluice24 Apr 200713 Apr 20224
u/s Parchey7 Sept 20117 Sept 20111
u/s Greylake sluice25 Apr 200714 Apr 20112

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

2007–2022

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 39 measured fish were spread across different length ranges.

Smallest
5.6 cm
Lower quarter
6.9 cm
Median
7.5 cm
Upper quarter
8.6 cm
Largest
11 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 13 ruffe. This is a subset of the measured fish and may not represent the whole population.

Lightest
0.1 oz (0.003 kg)
Lower quarter
0.2 oz (0.006 kg)
Median
0.3 oz (0.008 kg)
Upper quarter
0.5 oz (0.013 kg)
Heaviest
0.5 oz (0.015 kg)

These are direct individual weights recorded by Environment Agency surveyors. Combined bulk weights are not included.

More fish in this river

Explore the King's Sedgemoor Drain

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

Pike Roach Perch Silver bream Common bream 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 →