European eel · Anguilla anguilla

European eel in the River Cookham - Boulters

Largest measured european eel: 92.6 cm

The largest european eel measured in Environment Agency surveys of the River Cookham - Boulters was 92.6 cm, recorded at Cliveden Island on 7 September 2004.

Across 95 measured european eel, the median measured length was 68.5 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 Cookham - Boulters.

See european eel records across England →

Most recent observation28 July 2023Cliveden Island · 1 fish

Largest measured european eel: 92.6 cm
Median length: 68.5 cm
Fish measured: 95
Survey locations: 3

Individual EA measurements

Largest measured european eel

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
92.6 cm	7 Sept 2004	Cliveden Island	82508
86.2 cm	4 Sept 2007	Cliveden Island	106693
82.9 cm	4 Sept 2007	Odney Weir Stream, Cookham.	106681
81.5 cm	2 Sept 2013	Odney Weir Stream, Cookham.	138867
81.4 cm	10 Sept 2002	Cliveden Island	69061
80.5 cm	2 Sept 2013	Odney Weir Stream, Cookham.	138867
80.5 cm	23 Aug 2011	Odney Weir Stream, Cookham.	127586
80.5 cm	2 Sept 2003	Cliveden Island	76962
80 cm	23 Aug 2011	Odney Weir Stream, Cookham.	127586
79.6 cm	7 Sept 2004	Cliveden Island	82508

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where european eel were found

Each point marks a survey location with at least one european eel 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 european eel
Cliveden Island	1 Sept 1998	28 Jul 2023	13
Odney Weir Stream, Cookham.	1 Sept 2000	2 Sept 2013	15
Hedsor Weir Stream Cookham to Boulters	1 Sept 2005	1 Sept 2005	1

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

1998–2023

Survey records by year

Each bar shows how many survey visits recorded european eel that year.

198

099

200

201

202

203

204

305

206

207

208

109

110

411

112

113

014

015

016

017

018

019

020

021

022

123

Fish measured by surveyors

Measured length distribution

See how the 95 measured fish were spread across different length ranges.

Smallest: 34.5 cm
Lower quarter: 63 cm
Median: 68.5 cm
Upper quarter: 74.4 cm
Largest: 92.6 cm

300–399 mm

400–499 mm

500–599 mm

600–699 mm

700–799 mm

800–899 mm

900–999 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Cookham - Boulters

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

Bleak Roach Perch Pike Dace Chub

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 →