Ruffe · Gymnocephalus cernuus

Ruffe in the River Ranworth Broad

Largest measured ruffe: 11.5 cm

The largest ruffe measured in Environment Agency surveys of the River Ranworth Broad was 11.5 cm, recorded at 221 on 19 July 1987.

Across 967 measured ruffe, the median measured length was 6.8 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 Ranworth Broad.

See ruffe records across England →

Most recent observation13 August 1999221 · 55 fish

Largest measured ruffe: 11.5 cm
Median length: 6.8 cm
Fish measured: 967
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.

Length	Survey date	Survey location	Survey ID
11.5 cm	19 Jul 1987	221	17581
10.8 cm	16 Aug 1994	221	17598
10.6 cm	18 Jul 1987	224	17584
10.3 cm	19 Jul 1987	221	17581
10 cm	21 Aug 1987	223	17583
9.9 cm	19 Jul 1987	221	17581
9.5 cm	21 Aug 1987	223	17583
9 cm	18 Jul 1987	225	17585
8.9 cm	2 Sept 1991	224	17595
8.5 cm	4 Sept 1991	222	17594

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
221	19 Jul 1987	13 Aug 1999	4
225	18 Jul 1987	12 Aug 1999	4
222	19 Jul 1987	11 Aug 1999	4
224	18 Jul 1987	10 Aug 1999	4
220	20 Aug 1987	18 Aug 1994	2
223	21 Aug 1987	21 Aug 1987	1

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

1987–1999

Survey records by year

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

687

088

089

090

491

092

093

594

095

096

097

098

499

Fish measured by surveyors

Measured length distribution

See how the 967 measured fish were spread across different length ranges.

Smallest: 4.4 cm
Lower quarter: 6.4 cm
Median: 6.8 cm
Upper quarter: 7.2 cm
Largest: 11.5 cm

0–99 mm

962

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Ranworth Broad

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

Perch Common bream Roach Flounder

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 →