Ruffe · Gymnocephalus cernuus

Ruffe in the River Rollesby Broad

Largest measured ruffe: 12.1 cm

The largest ruffe measured in Environment Agency surveys of the River Rollesby Broad was 12.1 cm, recorded at 579 on 1 October 1997.

Across 151 measured ruffe, the median measured length was 7.4 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 Rollesby Broad.

See ruffe records across England →

Most recent observation23 September 2004570 · 2 fish

Largest measured ruffe: 12.1 cm
Median length: 7.4 cm
Fish measured: 151
Survey locations: 12

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	1 Oct 1997	579	17710
10.3 cm	22 Sept 2004	576	83668
8.9 cm	1 Oct 1997	579	17710
8.8 cm	29 Sept 1997	575	17706
8.8 cm	29 Sept 1997	575	17706
8.7 cm	1 Oct 1997	579	17710
8.7 cm	29 Sept 1997	575	17706
8.6 cm	29 Sept 1997	575	17706
8.5 cm	13 Oct 1997	582	17724
8.5 cm	6 Oct 1997	581	17723

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
570	24 Sept 1997	23 Sept 2004	2
576	22 Sept 2004	22 Sept 2004	1
574	29 Sept 1997	20 Sept 2004	2
578	1 Oct 1997	16 Sept 2004	2
580	15 Sept 2004	15 Sept 2004	1
582	13 Oct 1997	13 Oct 1997	1
581	6 Oct 1997	6 Oct 1997	1
579	1 Oct 1997	1 Oct 1997	1
577	30 Sept 1997	30 Sept 1997	1
575	29 Sept 1997	29 Sept 1997	1
573	25 Sept 1997	25 Sept 1997	1
572	25 Sept 1997	25 Sept 1997	1

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

1997–2004

Survey records by year

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

1097

098

099

000

001

002

003

504

Fish measured by surveyors

Measured length distribution

See how the 151 measured fish were spread across different length ranges.

Smallest: 5.1 cm
Lower quarter: 6.9 cm
Median: 7.4 cm
Upper quarter: 7.9 cm
Largest: 12.1 cm

0–99 mm

149

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Rollesby Broad

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

Perch Roach Common bream Pike

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 →