RiverFish

European eel · Anguilla anguilla

European eel in the River R.Slea

Largest measured european eel: 71.5 cm

The largest european eel measured in Environment Agency surveys of the River R.Slea was 71.5 cm, recorded at Bypass Bridge on 19 October 2023.

Across 430 measured european eel, the median measured length was 39.5 cm.

Surveyors recorded weights for 115 european eel. The median was 3.3 oz (0.094 kg) and the largest recorded weight was 1 lb 2.1 oz (0.512 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 R.Slea.

See european eel records across England →

Most recent observation20 September 2024DS Cogglesford Mill · 2 fish
Largest measured european eel
71.5 cm
Median length
39.5 cm
Fish measured
430
Survey locations
14

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
71.5 cm19 Oct 2023Bypass Bridge163662
70 cm10 Apr 2007Cobblers Lock105079
65 cm12 Sept 2013Bypass Bridge138759
63.5 cm5 Apr 2007Bypass Bridge105080
62.5 cm5 Apr 2007Bypass Bridge105080
60.5 cm7 Apr 2010Bypass Bridge121537
60.5 cm7 Apr 2010Bypass Bridge121537
60 cm22 Sept 2014Bypass Bridge143331
60 cm18 Apr 2006Cobblers Lock90932
60 cm18 Apr 2006Bypass Bridge90927

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 Cogglesford Mill20 Sept 202420 Sept 20241
Bypass Bridge5 Jun 198519 Oct 202312
Upstream Cogglesford Mill11 Oct 201811 Oct 20181
Chapel Hill (Kyme)13 May 19851 Oct 20145
Halfpenny Hatch31 May 198523 Sept 20146
Cobblers Lock3 Jun 19857 Apr 201011
Bouncing Hills21 Mar 199414 Apr 20052
Terry Booths Farm10 Jul 199710 Jul 19971
South Kyme Bridge29 May 19859 Jul 19974
Manor Farm19 Apr 19888 Jul 19972
White House4 Jun 19852 Jul 19975
Ancaster21 Mar 199421 Mar 19941
Wilsford Gauge Station18 Mar 199418 Mar 19941
Boiling Wells Farm18 Mar 199418 Mar 19941

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

1985–2024

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 430 measured fish were spread across different length ranges.

Smallest
15.5 cm
Lower quarter
32.6 cm
Median
39.5 cm
Upper quarter
46.9 cm
Largest
71.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 115 european eel. This is a subset of the measured fish and may not represent the whole population.

Lightest
0.7 oz (0.02 kg)
Lower quarter
2 oz (0.057 kg)
Median
3.3 oz (0.094 kg)
Upper quarter
5.9 oz (0.168 kg)
Heaviest
1 lb 2.1 oz (0.512 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 R.Slea

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

Roach 3-spined stickleback Gudgeon Dace Stone loach Pike

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 →