RiverFish

European eel · Anguilla anguilla

European eel in the River Allen (East & West)

Largest measured european eel: 70 cm

The largest european eel measured in Environment Agency surveys of the River Allen (East & West) was 70 cm, recorded at River Allen at Ridley Hall on 10 August 2022.

Across 111 measured european eel, the median measured length was 40 cm.

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the River Allen (East & West).

See european eel records across England →

Most recent observation3 July 2025River east Allen at Catton Bridge · 5 fish
Largest measured european eel
70 cm
Median length
40 cm
Fish measured
111
Survey locations
9

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
70 cm10 Aug 2022River Allen at Ridley Hall161713
67 cm10 Aug 2022River Allen at Ridley Hall161713
64.5 cm9 Aug 2022River east Allen at Catton Bridge161711
63.2 cm23 Jul 2014Church Burn 2141864
63 cm29 Jul 2012River east Allen at Catton Bridge132565
62 cm25 Jul 2024River east Allen at Catton Bridge167552
60 cm28 Jul 2017West Allen at ninebanks151089
58.2 cm5 Sept 2019River east Allen at Catton Bridge155531
57 cm10 Aug 2022River Allen at Ridley Hall161713
57 cm24 Jul 2014River Allen at Ridley Hall141880

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
River east Allen at Catton Bridge4 Sept 19953 Jul 202512
River Allen at Ridley Hall12 Jul 200925 Jul 20247
River West Allen at Corryhill1 Sept 20231 Sept 20231
Mohope Burn New Site3 Sept 20193 Sept 20191
Carrs Burn21 Aug 201821 Aug 20181
West Allen at ninebanks15 Jul 200528 Jul 20173
Church Burn 216 Jul 200823 Jul 20142
East Allen at Peasmeadows28 Aug 200220 Aug 20112
River Allen at Plankey Mill27 Jul 199527 Jul 19951

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

1995–2025

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 111 measured fish were spread across different length ranges.

Smallest
10.5 cm
Lower quarter
28 cm
Median
40 cm
Upper quarter
48.5 cm
Largest
70 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Allen (East & West)

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

Brown / sea trout Stone loach Atlantic salmon Minnow

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 →