RiverFish

European eel · Anguilla anguilla

European eel in the Main River Tone

Largest measured european eel: 77 cm

The largest european eel measured in Environment Agency surveys of the Main River Tone was 77 cm, recorded at Bathpool on 12 September 2006.

Across 2,364 measured european eel, the median measured length was 26 cm.

Surveyors recorded weights for 955 european eel. The median was 1.5 oz (0.043 kg) and the largest recorded weight was 1 lb 16 oz (0.907 kg).

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

See european eel records across England →

Most recent observation30 September 2025Roughmoor (Te) · 7 fish
Largest measured european eel
77 cm
Median length
26 cm
Fish measured
2,364
Survey locations
17

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
77 cm12 Sept 2006Bathpool101678
65 cm2 Sept 2010Bathpool123668
63.5 cm7 Sept 2007Bathpool107393
63 cm12 Sept 2006Bathpool101678
62 cm11 Sept 2003Priorswood (Te)77014
61 cm7 Sept 2007Bathpool107393
60 cm31 Aug 2001Cothay Manor72578
59.5 cm1 Sept 1994Trefusis Farm79715
59 cm4 May 2011Ash Farm (Salmon Project)126155
59 cm12 Sept 2006Bathpool101678

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
Roughmoor (Te)9 Oct 200330 Sept 202512
Bulland Lodge25 Aug 199229 Aug 202514
Bathpool12 Sept 200619 Sept 202410
Greenham (Se-03)16 Apr 200329 Jul 20214
Ash Farm (Salmon Project)1 Jun 200616 Aug 20189
Bradford on Tone21 May 200818 Jun 20142
Harpford Bridge11 Apr 20003 Jun 20143
Waterrow26 Aug 19928 May 20144
Priorswood (Te)11 Sept 20037 Oct 20096
Newbridge12 May 200912 May 20091
Hornshay Farm at Nynehead (Se-03)9 Sept 19947 Jun 20073
Parsonage Farm (Te)22 Sept 20034 Aug 20064
Marshes Farm7 Sept 20017 Sept 20011
Cothay Manor31 Aug 200131 Aug 20011
Incline Cottages8 Sept 19948 Sept 19941
Trefusis Farm1 Sept 19941 Sept 19941
Hele Hill31 Aug 199431 Aug 19941

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

1992–2025

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 2,364 measured fish were spread across different length ranges.

Smallest
6 cm
Lower quarter
20.5 cm
Median
26 cm
Upper quarter
31.5 cm
Largest
77 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 955 european eel. This is a subset of the measured fish and may not represent the whole population.

Lightest
0.1 oz (0.002 kg)
Lower quarter
0.8 oz (0.023 kg)
Median
1.5 oz (0.043 kg)
Upper quarter
2.6 oz (0.0725 kg)
Heaviest
1 lb 16 oz (0.907 kg)

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

More fish in this river

Explore the Main River Tone

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

Brown / sea trout Bullhead Stone loach Minnow Atlantic salmon Grayling

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 →