RiverFish

European eel · Anguilla anguilla

European eel in the River Calder

Largest measured european eel: 63 cm

The largest european eel measured in Environment Agency surveys of the River Calder was 63 cm, recorded at 1846.00 Near Strudda Bank, River Calder on 19 August 2015.

Across 220 measured european eel, the median measured length was 21.5 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 Calder.

See european eel records across England →

Most recent observation30 September 20251851.50 Ponsonby Lonning, Sellafield, River Calder · 2 fish
Largest measured european eel
63 cm
Median length
21.5 cm
Fish measured
220
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
63 cm19 Aug 20151846.00 Near Strudda Bank, River Calder146004
56 cm19 Aug 20151846.00 Near Strudda Bank, River Calder146004
47.5 cm30 Aug 20051847.00 Monks Cottage, River Calder86972
47.5 cm27 Aug 20031850.00 Pelham House, River Calder78729
42 cm13 Oct 20101847.00 Monks Cottage, River Calder124871
40 cm13 Oct 20101847.00 Monks Cottage, River Calder124871
38 cm31 Aug 20231847.00 Monks Cottage, River Calder163179
36 cm13 Oct 20101847.00 Monks Cottage, River Calder124871
35 cm13 Oct 20101847.00 Monks Cottage, River Calder124871
34 cm28 Aug 20191847.00 Monks Cottage, River Calder155354

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
1851.50 Ponsonby Lonning, Sellafield, River Calder13 Aug 201530 Sept 20253
1847.00 Monks Cottage, River Calder27 Aug 199830 Sept 202518
1851.40 Ponsonby Lonning DS Existing site CPUE21 Aug 202421 Aug 20241
1850.10 Pelham House CPUE13 Sept 202313 Sept 20231
1849.00 Near Calder Abbey, River Calder27 Aug 199828 Aug 20195
1846.00 Near Strudda Bank, River Calder27 Aug 199819 Aug 20153
1845.00 Upstream Worm Gill4 Sept 199818 Aug 20154
1845.50 Friar Gill20 Sept 200620 Sept 20061
1853.00 Downstream Sellafield, River Calder22 Sept 199827 Aug 20032
1850.00 Pelham House, River Calder22 Sept 199827 Aug 20032
1852.00 Sellafield Fishpass, River Calder22 Sept 199822 Sept 19981

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

1998–2025

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 220 measured fish were spread across different length ranges.

Smallest
7.5 cm
Lower quarter
17.4 cm
Median
21.5 cm
Upper quarter
27.5 cm
Largest
63 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Calder

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

Brown / sea trout Atlantic salmon

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 →