RiverFish

European eel · Anguilla anguilla

European eel in the Keasden Beck

Largest measured european eel: 45 cm

The largest european eel measured in Environment Agency surveys of the Keasden Beck was 45 cm, recorded at Clapham Hall Wood on 15 August 2016.

Across 35 measured european eel, the median measured length was 28 cm.

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the Keasden Beck.

See european eel records across England →

Most recent observation29 July 2025Clapham Hall Wood · 1 fish
Largest measured european eel
45 cm
Median length
28 cm
Fish measured
35
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
45 cm15 Aug 2016Clapham Hall Wood149032
45 cm1 Aug 2007Clapham Hall Wood106655
42 cm13 Aug 2013Clapham Hall Wood137994
42 cm17 Jul 1991Clapham Woods Farm115202
40 cm1 Aug 2007Clapham Hall Wood106655
39 cm17 Jul 1991Clapham Woods Farm115202
37 cm2 Oct 1997Clapham Hall Wood112507
36.5 cm11 Sept 1991Turner Ford115201
36 cm11 Sept 1991Turner Ford115201
36 cm17 Jul 1991Clapham Woods Farm115202

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
Clapham Hall Wood2 Oct 199729 Jul 20255
Turner Ford11 Sept 19912 Oct 19972
Clapham Woods Farm17 Jul 199117 Jul 19911

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

1991–2025

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 35 measured fish were spread across different length ranges.

Smallest
8 cm
Lower quarter
21.5 cm
Median
28 cm
Upper quarter
36 cm
Largest
45 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Keasden Beck

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

Brown / sea trout Atlantic salmon

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 →