RiverFish

European eel · Anguilla anguilla

European eel in the River Great Ouse

Largest measured european eel: 76 cm

The largest european eel measured in Environment Agency surveys of the River Great Ouse was 76 cm, recorded at US Denver Little Eye Sluice on 28 October 2008.

Across 189 measured european eel, the median measured length was 36.9 cm.

Surveyors recorded weights for 189 european eel. The median was 3.2 oz (0.09 kg) and the largest recorded weight was 2 lb 12.4 oz (1.26 kg).

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

See european eel records across England →

Most recent observation16 April 2026DS Brownshill Staunch · 1 fish
Largest measured european eel
76 cm
Median length
36.9 cm
Fish measured
189
Survey locations
6

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
76 cm28 Oct 2008US Denver Little Eye Sluice130167
75 cm4 Jul 2008DS Holywell130960
72 cm19 Nov 2009US Denver Little Eye Sluice130198
72 cm18 Nov 2009US A.G. Wright Sluice130192
70 cm15 Jul 2008DS Holywell130964
70 cm26 Jun 2008DS Holywell130958
68 cm19 Nov 2009US A.G. Wright Sluice130199
68 cm1 Aug 2008DS Holywell130970
66 cm26 Jun 2008DS Holywell130958
65 cm18 Nov 2009US Denver Little Eye Sluice130193

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
DS Brownshill Staunch16 Apr 202516 Apr 20262
US Denver Little Eye Sluice28 Oct 20082 Dec 20096
US Brownshill Staunch18 Nov 200919 Nov 20092
US A.G. Wright Sluice28 Oct 200819 Nov 20094
DS Brownshill Staunch24 Jun 20083 Sept 200820
DS Holywell24 Jun 200826 Aug 200818

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

2008–2026

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 189 measured fish were spread across different length ranges.

Smallest
12.5 cm
Lower quarter
30 cm
Median
36.9 cm
Upper quarter
46 cm
Largest
76 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 189 european eel. This is a subset of the measured fish and may not represent the whole population.

Lightest
0.2 oz (0.005 kg)
Lower quarter
1.8 oz (0.05 kg)
Median
3.2 oz (0.09 kg)
Upper quarter
6.3 oz (0.18 kg)
Heaviest
2 lb 12.4 oz (1.26 kg)

These are direct individual weights recorded by Environment Agency surveyors. Combined bulk weights are not included.

More fish in this river

Explore the River Great Ouse

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

Perch Roach Ruffe Pike Gudgeon

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 →