RiverFish

European eel · Anguilla anguilla

European eel in the River Nidd

Largest measured european eel: 70 cm

The largest european eel measured in Environment Agency surveys of the River Nidd was 70 cm, recorded at Skip Bridge on 23 June 2025.

Across 102 measured european eel, the median measured length was 34.2 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 Nidd.

See european eel records across England →

Most recent observation7 July 2025Cowthorpe · 1 fish
Largest measured european eel
70 cm
Median length
34.2 cm
Fish measured
102
Survey locations
15

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 cm23 Jun 2025Skip Bridge177011
68 cm28 Sept 2015Conyngham Hall146701
63 cm12 Jun 2008Scotton Mill111301
62 cm28 Sept 2015Conyngham Hall146701
59.2 cm12 Jun 2008Scotton Mill111301
55 cm22 Jun 2022Skip Bridge161167
55 cm13 Jul 2017Ribston Park150864
55 cm22 Jun 2016Knaresborough Bypass148273
54 cm2 Aug 2012Knaresborough Bypass132789
54 cm8 Jul 2011Kirk Hammerton127089

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
Cowthorpe23 Aug 20027 Jul 202512
Skip Bridge22 Jun 202223 Jun 20253
Moor Monkton27 Jun 202227 Jun 20221
Ribston Park (NEW 2018)3 Jul 20193 Jul 20191
Ribston Park26 Aug 20033 Jul 201912
Knaresborough Bypass26 Aug 20032 Jul 201915
Conyngham Hall28 Sept 201528 Sept 20151
u/s Pately Bridge30 Oct 200124 Sept 20153
Scotton Mill12 Jun 20089 Sept 20152
Birstwith13 Jun 20057 Sept 20153
Goldsborough22 Jul 201522 Jul 20151
Kirk Hammerton21 Aug 200229 Jun 20159
Nun Monkton21 Aug 200220 Jun 20139
Summerbridge6 Jun 20086 Jun 20081
u/s Hampsthwaite Bridge9 Jun 20059 Jun 20051

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

2001–2025

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 102 measured fish were spread across different length ranges.

Smallest
13 cm
Lower quarter
25 cm
Median
34.3 cm
Upper quarter
41.1 cm
Largest
70 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Nidd

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

Minnow Bullhead Stone loach Grayling Brown / sea trout Gudgeon

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 →