Ruffe · Gymnocephalus cernuus

Ruffe in the Eel Survey

Largest measured ruffe: 12.1 cm

The largest ruffe measured in Environment Agency surveys of the Eel Survey was 12.1 cm, recorded at Bathpool on 7 September 2007.

Across 72 measured ruffe, the median measured length was 7.8 cm.

Surveyors recorded weights for 13 ruffe. The median was 0.2 oz (0.007 kg) and the largest recorded weight was 0.4 oz (0.012 kg).

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

See ruffe records across England →

Most recent observation13 August 2013Huntspill at Sloway · 2 fish

Largest measured ruffe: 12.1 cm
Median length: 7.8 cm
Fish measured: 72
Survey locations: 5

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
12.1 cm	7 Sept 2007	Bathpool	110553
12 cm	1 Sept 2009	Bathpool	118815
11.7 cm	7 Sept 2007	Bathpool	110553
11.1 cm	30 Jul 2008	Bow Bridge	112304
10.7 cm	7 Aug 2007	Huntspill at Sloway	106284
10.5 cm	17 Aug 2009	Huntspill at Sloway	118470
10.5 cm	3 Aug 2007	Bow Bridge	110659
10.2 cm	10 Aug 2010	Huntspill at Sloway	123522
10 cm	13 Aug 2009	Huntspill at Sloway	118407
10 cm	12 Aug 2009	Huntspill at Sloway	118364

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
Huntspill at Sloway	9 Aug 2006	13 Aug 2013	34
Bathpool	7 Sept 2007	1 Sept 2009	2
Oath Lock Downstream	11 Aug 2009	11 Aug 2009	1
Sloway extra	4 Aug 2009	4 Aug 2009	1
Bow Bridge	3 Aug 2007	30 Jul 2008	2

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

2006–2013

Survey records by year

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

806

507

208

1209

310

611

312

113

Fish measured by surveyors

Measured length distribution

See how the 72 measured fish were spread across different length ranges.

Smallest: 3.8 cm
Lower quarter: 7 cm
Median: 7.8 cm
Upper quarter: 8.7 cm
Largest: 12.1 cm

0–99 mm

100–199 mm

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 (0.005 kg)
Median: 0.2 oz (0.007 kg)
Upper quarter: 0.3 oz (0.008 kg)
Heaviest: 0.4 oz (0.012 kg)

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

More fish in this river

Explore the Eel Survey

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

European eel Roach Gudgeon Bullhead Perch Stone loach

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 →