RiverFish

European eel · Anguilla anguilla

European eel in the River Tas

Largest measured european eel: 62 cm

The largest european eel measured in Environment Agency surveys of the River Tas was 62 cm, recorded at CEGB Trowse on 27 April 2005.

Across 519 measured european eel, the median measured length was 31.6 cm.

Surveyors recorded weights for 281 european eel. The median was 2.1 oz (0.06 kg) and the largest recorded weight was 15.9 oz (0.45 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 Tas.

See european eel records across England →

Most recent observation1 April 2026Flordon Common · 1 fish
Largest measured european eel
62 cm
Median length
31.6 cm
Fish measured
519
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
62 cm27 Apr 2005CEGB Trowse84615
58 cm22 Apr 2005Upstream Hempnall Beck84614
57 cm1 May 2013Downstream Forncett Street135977
57 cm11 Apr 2005Downstream Forncett Street84420
56 cm8 Apr 2010Downstream Stoke Mill121365
56 cm27 Apr 2005CEGB Trowse84615
55.4 cm6 Apr 2010Markshall Bridge121342
55 cm16 Apr 2010Upstream Shotesham Park121450
54 cm19 Apr 2005Downstream Stoke Mill84428
53 cm22 Apr 2005Upstream Hempnall Beck84614

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
Flordon Common28 Apr 19871 Apr 202617
Downstream Stoke Mill7 Apr 19872 May 202410
Upstream Shotesham Park9 Apr 198730 Apr 202410
Markshall Bridge6 Apr 198725 Apr 202410
Tasburgh Mill Farm27 Apr 19879 May 201811
Downstream Forncett Street22 Apr 19871 May 20137
CEGB Trowse8 Apr 198727 Apr 20053
Upstream Hempnall Beck15 Apr 198722 Apr 20054
Upstream Tasburgh Hall24 Apr 19877 Apr 20055
Upstream Tharston Mill14 Apr 19879 May 20004
Rainthorpe Hall16 Apr 198730 Sept 19922

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

1987–2026

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 519 measured fish were spread across different length ranges.

Smallest
12 cm
Lower quarter
25.1 cm
Median
31.6 cm
Upper quarter
37 cm
Largest
62 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 281 european eel. This is a subset of the measured fish and may not represent the whole population.

Lightest
0.1 oz (0.003 kg)
Lower quarter
1.1 oz (0.03 kg)
Median
2.1 oz (0.06 kg)
Upper quarter
3.4 oz (0.095 kg)
Heaviest
15.9 oz (0.45 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 Tas

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

Stone loach Roach Bullhead Dace 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 →