RiverFish

European eel · Anguilla anguilla

European eel in the River Eyebrook

Largest measured european eel: 38.5 cm

The largest european eel measured in Environment Agency surveys of the River Eyebrook was 38.5 cm, recorded at Downstream Eyebrook Reservoir on 8 September 2022.

Across 43 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 River Eyebrook.

See european eel records across England →

Most recent observation2 April 2026Downstream Eyebrook Reservoir · 1 fish
Largest measured european eel
38.5 cm
Median length
28 cm
Fish measured
43
Survey locations
2

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
38.5 cm8 Sept 2022Downstream Eyebrook Reservoir162253
38 cm2 Apr 2026Downstream Eyebrook Reservoir180851
37 cm1 Jun 2011Downstream Eyebrook Reservoir126520
35 cm1 Jun 2011Downstream Eyebrook Reservoir126520
35 cm1 Jun 2011Downstream Eyebrook Reservoir126520
34 cm1 Jun 2011Downstream Eyebrook Reservoir126520
34 cm1 Jun 2011Downstream Eyebrook Reservoir126520
33 cm1 Jun 2011Downstream Eyebrook Reservoir126520
32 cm1 Jun 2011Downstream Eyebrook Reservoir126520
31 cm5 Oct 2016Downstream Eyebrook Reservoir150068

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
Downstream Eyebrook Reservoir10 Apr 19902 Apr 202612
Downstream Caldecott Road Bridge16 May 199616 May 19961

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

1990–2026

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 43 measured fish were spread across different length ranges.

Smallest
16 cm
Lower quarter
26 cm
Median
28 cm
Upper quarter
30.5 cm
Largest
38.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Eyebrook

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

Bullhead Brown / sea trout Minnow Stone loach Dace Roach

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 →