Ruffe · Gymnocephalus cernuus

Ruffe in the River Lymn FMU

Largest measured ruffe: 13.5 cm

The largest ruffe measured in Environment Agency surveys of the River Lymn FMU was 13.5 cm, recorded at Mill Bridge on 16 August 2006.

Across 33 measured ruffe, the median measured length was 9.1 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 Lymn FMU.

See ruffe records across England →

Most recent observation7 November 2025Mill Bridge · 3 fish

Largest measured ruffe: 13.5 cm
Median length: 9.1 cm
Fish measured: 33
Survey locations: 1

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
13.5 cm	16 Aug 2006	Mill Bridge	100692
12.2 cm	29 Apr 2002	Mill Bridge	59065
12 cm	17 Jun 2004	Mill Bridge	82819
11.1 cm	29 Apr 2002	Mill Bridge	59065
10.9 cm	31 Jul 2012	Mill Bridge	132824
10.4 cm	16 Aug 2006	Mill Bridge	100692
10.4 cm	17 Jun 2004	Mill Bridge	82819
10.1 cm	3 Apr 1996	Mill Bridge	58154
9.5 cm	16 Aug 2006	Mill Bridge	100692
9.5 cm	16 Aug 2006	Mill Bridge	100692

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
Mill Bridge	3 Apr 1996	7 Nov 2025	6

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

1996–2025

Survey records by year

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

196

097

098

099

000

001

102

003

104

005

106

007

008

009

010

011

112

013

014

015

016

017

018

019

020

021

022

023

024

125

Fish measured by surveyors

Measured length distribution

See how the 33 measured fish were spread across different length ranges.

Smallest: 4.9 cm
Lower quarter: 7.8 cm
Median: 9.1 cm
Upper quarter: 9.5 cm
Largest: 13.5 cm

0–99 mm

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Lymn FMU

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

Bullhead Brown / sea trout European eel 3-spined stickleback Roach Perch

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 →