Ruffe · Gymnocephalus cernuus

Ruffe in the Lee Navigation

Largest measured ruffe: 12.7 cm

The largest ruffe measured in Environment Agency surveys of the Lee Navigation was 12.7 cm, recorded at Waltham Abbey Marsh on 22 November 1978.

Across 56 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 Lee Navigation.

See ruffe records across England →

Most recent observation11 July 2024Hertford Basin · 1 fish

Largest measured ruffe: 12.7 cm
Median length: 9.1 cm
Fish measured: 56
Survey locations: 8

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
12.7 cm	22 Nov 1978	Waltham Abbey Marsh	116732
12.4 cm	22 Nov 1978	Waltham Abbey Marsh	116732
12.4 cm	22 Nov 1978	Waltham Abbey Marsh	116732
11.8 cm	22 Nov 1978	Waltham Abbey Marsh	116732
11.7 cm	22 Jan 1993	Rye House	116025
11.7 cm	22 Nov 1978	Waltham Abbey Marsh	116732
11.6 cm	22 Jan 1993	Rye House	116025
11.6 cm	22 Nov 1978	Waltham Abbey Marsh	116732
11.6 cm	22 Nov 1978	Waltham Abbey Marsh	116732
11.5 cm	9 Jul 2013	Ponders End	137224

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
Hertford Basin	27 Sept 2006	11 Jul 2024	3
Picketts Lock	3 Oct 2003	27 Jul 2016	3
Ponders End	2 Sept 2004	9 Jul 2013	2
Dobbs Weir	8 Jul 2013	8 Jul 2013	1
Ware Priory	7 Oct 2004	20 Aug 2009	2
Enfield Lock	1 Sept 2004	1 Sept 2004	1
Rye House	22 Jan 1993	22 Jan 1993	1
Waltham Abbey Marsh	22 Nov 1978	22 Nov 1978	1

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

1978–2024

Survey records by year

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

178

079

080

081

082

083

084

085

086

087

088

089

090

091

092

193

094

095

096

097

098

099

000

001

002

103

304

005

106

007

008

109

010

011

012

213

114

015

216

017

018

019

020

021

022

023

124

Fish measured by surveyors

Measured length distribution

See how the 56 measured fish were spread across different length ranges.

Smallest: 2.9 cm
Lower quarter: 7.4 cm
Median: 9.1 cm
Upper quarter: 10.9 cm
Largest: 12.7 cm

0–99 mm

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Lee Navigation

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

Roach Perch Pike Chub Bleak Tench

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 →