RiverFish

European eel · Anguilla anguilla

European eel in the River Glaven

Largest measured european eel: 66 cm

The largest european eel measured in Environment Agency surveys of the River Glaven was 66 cm, recorded at D/s Hunworth railway bridge on 7 May 2025.

Across 1,904 measured european eel, the median measured length was 24.5 cm.

Surveyors recorded weights for 846 european eel. The median was 0.9 oz (0.026 kg) and the largest recorded weight was 1 lb 0.6 oz (0.472 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 Glaven.

See european eel records across England →

Most recent observation16 June 2026Upstream Glandford Mill · 7 fish
Largest measured european eel
66 cm
Median length
24.5 cm
Fish measured
1,904
Survey locations
11

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
66 cm7 May 2025D/s Hunworth railway bridge177177
64 cm1 Jun 2017Thornage Bridge151538
63 cm2 May 2019Upstream Thornage Ford155908
62 cm10 Jun 2014Upstream Wiveton Bridge142232
62 cm15 May 2014Upstream Thornage Ford140965
61.8 cm20 May 2014Upstream Glandford Mill141006
61 cm15 May 2008Letheringsett111288
60.6 cm24 Jun 2010D/s Hunworth railway bridge123104
60.1 cm3 Jun 2014D/s Hunworth railway bridge141515
59.7 cm1 Jun 2011Thornage Bridge127611

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
Upstream Glandford Mill20 Jan 198816 Jun 202610
Letheringsett18 Jan 198821 May 202610
Upstream Thornage Ford14 Jan 198816 May 202513
D/s Hunworth railway bridge12 Jan 19887 May 202517
Upstream Wiveton Bridge22 Jan 198811 Jul 20239
Thornage Bridge13 Jan 19888 Jun 20239
Hempstead Mill bridge23 Jan 20035 Dec 20143
Hunworth Rail Bridge U/s12 May 20085 Jun 20148
Hunworth5 Apr 199129 Apr 20084
Hempstead , Split Hills Plantation5 Feb 20035 Feb 20031
Cley Sluice9 Jul 19999 Jul 19991

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

1988–2026

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 1,904 measured fish were spread across different length ranges.

Smallest
6.9 cm
Lower quarter
19.3 cm
Median
24.5 cm
Upper quarter
31.1 cm
Largest
66 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 846 european eel. This is a subset of the measured fish and may not represent the whole population.

Lightest
0 oz (0.0013 kg)
Lower quarter
0.4 oz (0.0115 kg)
Median
0.9 oz (0.026 kg)
Upper quarter
1.9 oz (0.0551 kg)
Heaviest
1 lb 0.6 oz (0.472 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 Glaven

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

Bullhead 3-spined stickleback Brook lamprey Pike Perch 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 →