RiverFish

European eel · Anguilla anguilla

European eel in the River Derwent

Largest measured european eel: 61 cm

The largest european eel measured in Environment Agency surveys of the River Derwent was 61 cm, recorded at River Derwent at Crooked Oak on 11 July 2025.

Across 175 measured european eel, the median measured length was 27 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 Derwent.

See european eel records across England →

Most recent observation15 July 2025River Derwent at Rowlands Gill · 3 fish
Largest measured european eel
61 cm
Median length
27 cm
Fish measured
175
Survey locations
13

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
61 cm11 Jul 2025River Derwent at Crooked Oak177512
59 cm30 Jun 2023River Derwent at Shotley Bridge163634
59 cm2 Sept 2014River Derwent at Shotley Bridge142553
58 cm16 Aug 2017River Derwent at Crooked Oak151264
57 cm6 Oct 2016River Derwent at Shotley Bridge149594
56.5 cm16 Aug 2017River Derwent at Crooked Oak151264
55.7 cm17 Aug 2017River Derwent at Shotley Bridge151266
55 cm31 Jul 2013River Derwent at Blackhall Mill137574
53 cm6 Sept 2019River Derwent at Allensford155935
52.8 cm31 Jul 2013River Derwent at Shotley Bridge137577

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 Derwent at Rowlands Gill21 Aug 200715 Jul 20259
River Derwent at Ebchester21 Aug 200715 Jul 20254
River Derwent at Clockburn28 Aug 200715 Jul 20253
River Derwent at Blackhall Mill9 Aug 200915 Jul 20259
River Derwent at Shotley Bridge31 Jul 201314 Jul 20258
River Derwent at Cricket Club20 Aug 200714 Jul 20253
River Derwent at Allensford2 Sept 201414 Jul 20253
River Derwent at Eddy's Bridge13 Sept 200911 Jul 20255
River Derwent at Crooked Oak30 Jul 201311 Jul 20254
Hisehope Burn11 Jul 202511 Jul 20251
River Derwent at Hag Hill27 Aug 200718 Aug 20174
River Derwent at Lintzford2 Aug 201317 Aug 20173
River Derwent at Ebchester Bridge26 Sept 201526 Sept 20151

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

2007–2025

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 175 measured fish were spread across different length ranges.

Smallest
9.5 cm
Lower quarter
19 cm
Median
27 cm
Upper quarter
36.5 cm
Largest
61 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Derwent

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

Brown / sea trout Minnow Bullhead Stone loach Atlantic salmon Grayling

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 →