RiverFish

Ruffe · Gymnocephalus cernuus

Ruffe in the River Dearne

Largest measured ruffe: 11.9 cm

The largest ruffe measured in Environment Agency surveys of the River Dearne was 11.9 cm, recorded at meanders u/s Pastures Bridge on 4 July 2019.

Across 8 measured ruffe, the median measured length was 5.1 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 Dearne.

See ruffe records across England →

Most recent observation19 June 2025meanders u/s Pastures Bridge · 1 fish
Largest measured ruffe
11.9 cm
Median length
5.1 cm
Fish measured
8
Survey locations
2

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
11.9 cm4 Jul 2019meanders u/s Pastures Bridge154823
11.2 cm19 Jun 2025meanders u/s Pastures Bridge176954
9.7 cm17 Jun 2022meanders u/s Pastures Bridge161165
5.3 cm6 Aug 2018Pastures Bridge - Fry Survey153172
4.9 cm18 Aug 2014Pastures Bridge - Fry Survey142722
4.8 cm18 Aug 2014Pastures Bridge - Fry Survey142722
4.7 cm6 Aug 2018Pastures Bridge - Fry Survey153172
4.1 cm18 Aug 2014Pastures Bridge - Fry Survey142722

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
meanders u/s Pastures Bridge4 Jul 201919 Jun 20253
Pastures Bridge - Fry Survey18 Aug 20146 Aug 20182

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

2014–2025

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 8 measured fish were spread across different length ranges.

Smallest
4.1 cm
Lower quarter
4.8 cm
Median
5.1 cm
Upper quarter
10.1 cm
Largest
11.9 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Dearne

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

3-spined stickleback Gudgeon Brown / sea trout Chub Roach Minnow

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 →