RiverFish

European eel · Anguilla anguilla

European eel in the River Calder

Largest measured european eel: 55 cm

The largest european eel measured in Environment Agency surveys of the River Calder was 55 cm, recorded at Calder Vale on 26 August 2005.

Across 93 measured european eel, the median measured length was 18 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 observation18 July 2022B6430 Bridge, Catterall · 15 fish
Largest measured european eel
55 cm
Median length
18 cm
Fish measured
93
Survey locations
3

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
55 cm26 Aug 2005Calder Vale87319
53 cm18 Jul 2022B6430 Bridge, Catterall161192
49 cm20 Jul 2016Calder Vale148576
49 cm28 Jun 2016B6430 Bridge, Catterall148294
48 cm31 Aug 2021B6430 Bridge, Catterall160210
45 cm20 Jun 2013Calder Vale136494
44 cm15 Jul 2010B6430 Bridge, Catterall122890
40 cm20 Jul 2016Calder Vale148576
40 cm20 Jun 2013Calder Vale136494
38 cm31 Aug 2021Calder Vale160209

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
B6430 Bridge, Catterall24 Aug 199918 Jul 20226
Oakenclough17 Sept 202117 Sept 20211
Calder Vale26 Aug 200531 Aug 20214

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

1999–2022

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 93 measured fish were spread across different length ranges.

Smallest
6.5 cm
Lower quarter
11 cm
Median
18 cm
Upper quarter
28 cm
Largest
55 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 →