RiverFish

European eel · Anguilla anguilla

European eel in the River Yeo

Largest measured european eel: 59 cm

The largest european eel measured in Environment Agency surveys of the River Yeo was 59 cm, recorded at Gunstone Mill (Sp) on 23 June 2022.

Across 56 measured european eel, the median measured length was 25.8 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 Yeo.

See european eel records across England →

Most recent observation3 July 2025Downstream Golf Course Footbridge (Te) · 7 fish
Largest measured european eel
59 cm
Median length
25.8 cm
Fish measured
56
Survey locations
5

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
59 cm23 Jun 2022Gunstone Mill (Sp)161136
50 cm14 Jun 2013Downstream Salmon Hutch (Sp)137126
49 cm27 Jul 2021Gunstone Mill (Sp)160635
48 cm11 Aug 2017Downstream Golf Course Footbridge (Te)151363
47 cm14 Jun 2013Downstream Salmon Hutch (Sp)137126
45.5 cm13 Jun 2013Downstream Golf Course Footbridge (Te)136556
44.5 cm27 Jun 2019Downstream Golf Course Footbridge (Te)154663
44 cm23 Jun 2023Downstream Salmon Hutch (Sp)164003
43 cm2 Jun 2011Downes Mill (Te)*126399
42 cm11 Jun 2015Downstream Golf Course Footbridge (Te)144977

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 Golf Course Footbridge (Te)13 Jun 20133 Jul 20256
Downstream Salmon Hutch (Sp)19 Jun 199723 Jun 20235
Gunstone Mill (Sp)19 Jun 199723 Jun 20226
Downes Mill (Te)*5 Jun 19972 Jun 20115
Mill Bridge (Sp/)5 Jun 19975 Jun 19971

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

1997–2025

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 56 measured fish were spread across different length ranges.

Smallest
4.1 cm
Lower quarter
17.9 cm
Median
25.8 cm
Upper quarter
35.7 cm
Largest
59 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Yeo

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

Brown / sea trout Bullhead Stone loach Minnow

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 →