Ruffe · Gymnocephalus cernuus

Ruffe in the River Filby Broad

Largest measured ruffe: 9.1 cm

The largest ruffe measured in Environment Agency surveys of the River Filby Broad was 9.1 cm, recorded at 551 on 19 August 1997.

Across 48 measured ruffe, the median measured length was 6 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 Filby Broad.

See ruffe records across England →

Most recent observation27 August 1997559 · 6 fish

Largest measured ruffe: 9.1 cm
Median length: 6 cm
Fish measured: 48
Survey locations: 7

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
9.1 cm	19 Aug 1997	551	17664
9 cm	26 Aug 1997	557	17669
6.8 cm	27 Aug 1997	559	17671
6.8 cm	27 Aug 1997	559	17671
6.7 cm	26 Aug 1997	557	17669
6.6 cm	27 Aug 1997	559	17671
6.5 cm	19 Aug 1997	551	17664
6.5 cm	19 Aug 1997	551	17664
6.4 cm	27 Aug 1997	559	17671
6.4 cm	26 Aug 1997	557	17669

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
559	27 Aug 1997	27 Aug 1997	1
557	26 Aug 1997	26 Aug 1997	1
555	21 Aug 1997	21 Aug 1997	1
553	20 Aug 1997	20 Aug 1997	1
552	20 Aug 1997	20 Aug 1997	1
551	19 Aug 1997	19 Aug 1997	1
550	19 Aug 1997	19 Aug 1997	1

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

1997–1997

Survey records by year

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

797

Fish measured by surveyors

Measured length distribution

See how the 48 measured fish were spread across different length ranges.

Smallest: 4.9 cm
Lower quarter: 5.7 cm
Median: 6.1 cm
Upper quarter: 6.4 cm
Largest: 9.1 cm

0–99 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Filby Broad

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

Perch Roach Common bream

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 →