RiverFish

European eel · Anguilla anguilla

European eel in the River Marlow - Cookham

Largest measured european eel: 95 cm

The largest european eel measured in Environment Agency surveys of the River Marlow - Cookham was 95 cm, recorded at Marlow - Cookham Upper Main Channel on 4 September 2006.

Across 244 measured european eel, the median measured length was 68 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 Marlow - Cookham.

See european eel records across England →

Most recent observation27 July 2025Marlow - Cookham Upper Main Channel · 4 fish
Largest measured european eel
95 cm
Median length
68 cm
Fish measured
244
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.

LengthSurvey dateSurvey locationSurvey ID
95 cm4 Sept 2006Marlow - Cookham Upper Main Channel101383
91 cm4 Sept 2006Marlow - Cookham Upper Main Channel101383
88 cm1 Sept 2014Marlow - Cookham Upper Main Channel142522
87.5 cm5 Sept 2011Marlow - Cookham Upper Main Channel128117
86.5 cm1 Sept 2008Marlow - Cookham Upper Main Channel114247
85.5 cm1 Sept 2000Marlow - Cookham Upper Main Channel121556
84 cm7 Sept 2009Cookham Lock Cut119000
84 cm3 Sept 2007Marlow - Cookham Upper Main Channel106680
83.5 cm6 Sept 2004Marlow - Cookham Upper Main Channel82341
83 cm28 Jul 2023Marlow - Cookham Upper Main Channel163989

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 surveyedFirst recordedLast recordedVisits finding european eel
Marlow - Cookham Upper Main Channel1 Sept 199527 Jul 202522
Cookham Lock Cut3 Sept 20077 Sept 20093
Marlow Weir Pool1 Sept 200031 Aug 20052

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

1995–2025

Survey records by year

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

Fish measured by surveyors

Measured length distribution

See how the 244 measured fish were spread across different length ranges.

Smallest
29 cm
Lower quarter
58 cm
Median
68 cm
Upper quarter
74.5 cm
Largest
95 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Marlow - Cookham

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

Bleak Perch Pike Roach Chub Dace

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 →