RiverFish

Ruffe · Gymnocephalus cernuus

Ruffe in the River South Walsham Broad

Largest measured ruffe: 13.5 cm

The largest ruffe measured in Environment Agency surveys of the River South Walsham Broad was 13.5 cm, recorded at 234 on 14 September 1990.

Across 636 measured ruffe, the median measured length was 7.1 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 South Walsham Broad.

See ruffe records across England →

Most recent observation17 September 2002234 · 135 fish
Largest measured ruffe
13.5 cm
Median length
7.1 cm
Fish measured
636
Survey locations
6

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
13.5 cm14 Sept 199023417621
13.4 cm14 Sept 199023417621
13.2 cm14 Sept 199023417621
13 cm23 Aug 199923417766
12.6 cm14 Sept 199023417621
12.3 cm23 Aug 199923417766
11.1 cm6 Aug 198723617619
10.7 cm4 Aug 198723417617
10.1 cm4 Aug 198723417617
10 cm13 Sept 199023717623

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
2366 Aug 198717 Sept 20023
2344 Aug 198717 Sept 20025
2325 Aug 198717 Sept 20022
2376 Aug 198717 Aug 19994
2356 Aug 198731 Aug 19943
2335 Aug 19875 Aug 19871

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

1987–2002

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 636 measured fish were spread across different length ranges.

Smallest
4.1 cm
Lower quarter
6.2 cm
Median
7.1 cm
Upper quarter
8 cm
Largest
13.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River South Walsham Broad

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

Roach Common bream Perch Flounder Pike Smelt

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 →