RiverFish

European eel · Anguilla anguilla

European eel in the River Aln

Largest measured european eel: 59 cm

The largest european eel measured in Environment Agency surveys of the River Aln was 59 cm, recorded at River Aln at Lady's Well on 16 July 2024.

Across 576 measured european eel, the median measured length was 26 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 Aln.

See european eel records across England →

Most recent observation23 June 2026River Aln at Lady's Well · 22 fish
Largest measured european eel
59 cm
Median length
26 cm
Fish measured
576
Survey locations
34

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
59 cm16 Jul 2024River Aln at Lady's Well166121
59 cm3 Aug 2012River Aln at Abberwick Ford132638
57.5 cm2 Jul 2019River Aln at Abberwick Ford154723
57 cm17 Jun 2025River Aln at Bolton Mill176974
56 cm23 Jun 2026River Aln at Lady's Well181855
56 cm2 Aug 2016River Aln at Lady's Well148756
56 cm7 Oct 2013River Aln at Old Hawkhill Ford139192
54 cm17 Jun 2025River Aln at Bolton Mill176974
54 cm2 Jul 2019River Aln at Abberwick Ford154723
54 cm17 Sept 2012Cawledge Burn133594

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 Aln at Lady's Well22 Sept 199323 Jun 202624
River Aln at Bolton Mill23 Sept 199323 Jun 202616
Eglingham Burn at Shipley29 Sept 199723 Jun 202621
Edlingham Burn at Battle Bridge13 Sept 199623 Jun 202614
Cawledge Burn site #22 Aug 200116 Jul 20244
Cawledge Burn1 Oct 199716 Jul 20243
Titlington burn7 Aug 20018 Jul 20243
Shipley burn at Aln Confluence8 Aug 20018 Jul 20245
Shipley Burn29 Sept 19958 Jul 20245
Denwick Burn at Golden Moor Farm13 Jul 20058 Jul 20243
Denwick Burn12 Oct 20018 Jul 20244
River Aln at Old Hawkhill Ford9 Sept 19963 Jul 20249
River Aln at Abberwick Mill.6 Aug 20011 Jul 20243
River Aln at Abberwick Ford20 Sept 19931 Jul 20244
Glen aln Burn1 Jul 20241 Jul 20241
Shawdon Burn13 Sept 199626 Jun 20243
Edlingham Burn at Lemmington26 Jun 202426 Jun 20241
River Aln at Whittingham16 Sept 199625 Jun 20242
River Aln at Bridge of Aln16 Sept 199625 Jun 20244
River Aln Upstream of Whittingham Ford23 Sept 199324 Jun 20247
Callally Burn, callally mill2 Sept 201224 Jun 20242
Edlingham Burn at Bannermoor29 Sept 199514 Sept 20155
River Aln at Hulne Priory5 Aug 200816 Sept 20142
River Aln at Little Ryle6 Oct 199511 Sept 20142
Callally Burn at Whittingham21 Aug 20012 Jul 20132
Aln at Bridge End18 Sept 201218 Sept 20121
Edlingham Burn12 Sept 199613 Sept 20123
Coe Burn2 Sept 20122 Sept 20121
River Aln at Hulne Park26 Sept 200826 Sept 20081
River Aln at Filberthaugh21 Sept 199326 Aug 20089
Shipley Burn B6346 Road Bge8 Jul 20028 Jul 20021
River Aln at Lesbury20 Sept 19938 Aug 20012
Cawledge Burn, Rugley Wood6 Oct 19956 Oct 19951
River Aln at Alndyke20 Sept 199320 Sept 19931

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

1993–2026

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 576 measured fish were spread across different length ranges.

Smallest
7.5 cm
Lower quarter
19 cm
Median
26 cm
Upper quarter
35 cm
Largest
59 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Aln

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

Brown / sea trout Stone loach Atlantic salmon Minnow 3-spined stickleback River lamprey

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 →