RiverFish

European eel · Anguilla anguilla

European eel in the River Nar

Largest measured european eel: 72.4 cm

The largest european eel measured in Environment Agency surveys of the River Nar was 72.4 cm, recorded at Narford Hall Estate on 8 March 2017.

Across 1,689 measured european eel, the median measured length was 35.4 cm.

Surveyors recorded weights for 1,544 european eel. The median was 3 oz (0.085 kg) and the largest recorded weight was 1 lb 12.2 oz (0.8 kg).

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the River Nar.

See european eel records across England →

Most recent observation1 April 2026Bone Mill · 17 fish
Largest measured european eel
72.4 cm
Median length
35.4 cm
Fish measured
1,689
Survey locations
21

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
72.4 cm8 Mar 2017Narford Hall Estate150294
71.1 cm18 Mar 2015Narford Hall Estate144467
70.4 cm18 Mar 2015Bradmoor Cottages Narborough144464
69.2 cm31 Mar 2015Marham Intake144496
69 cm2 Apr 2007Narford Hall Estate105046
68.6 cm8 Mar 2017Narford Hall Estate150294
68.4 cm21 Mar 2012Narford Hall Estate130214
68.3 cm18 Mar 2015Bradmoor Cottages Narborough144464
68.1 cm16 Mar 2015Abbey Farm144461
67.5 cm9 Apr 2019Narford Hall Estate154425

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
Bone Mill1 Apr 20261 Apr 20261
Castle Acre10 Nov 19894 Mar 202620
DS Narborough Mill20 Mar 20071 Apr 20255
West Lexham9 Nov 198911 Mar 202510
Narford Hall Estate19 Jan 199010 Mar 202013
Bradmoor Cottages Narborough4 Oct 20137 Mar 20195
Manor Farm13 Nov 19896 Mar 201913
Wormegay High Bridge8 Nov 198921 Mar 20177
DS Abbey Farm Weir (Eel Monitoring)9 Jun 200820 Mar 20176
Abbey Farm16 Nov 198920 Mar 20177
Marham Intake15 Nov 198914 Mar 20178
DS Marham Sluice14 Mar 201714 Mar 20171
White House Farm Kings Lynn1 Apr 20151 Apr 20151
Saddlebow18 Jan 199026 Mar 20155
Setchey11 Jan 199017 Mar 20156
High Bridge Side Channel17 Nov 198912 Mar 20155
DS Narford Hall Estate3 Oct 20133 Oct 20131
Warren Farm14 Nov 198929 Mar 20127
East Lexham11 Mar 200312 Mar 20124
US Sluice Kings Lynn12 Jan 199015 Apr 20105
Nar Valley Fishery3 Apr 19963 Apr 19961

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

1989–2026

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 1,689 measured fish were spread across different length ranges.

Smallest
10 cm
Lower quarter
29.1 cm
Median
35.4 cm
Upper quarter
43 cm
Largest
72.4 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 1,544 european eel. This is a subset of the measured fish and may not represent the whole population.

Lightest
0.2 oz (0.005 kg)
Lower quarter
1.6 oz (0.045 kg)
Median
3 oz (0.085 kg)
Upper quarter
5.3 oz (0.15 kg)
Heaviest
1 lb 12.2 oz (0.8 kg)

These are direct individual weights recorded by Environment Agency surveyors. Combined bulk weights are not included.

More fish in this river

Explore the River Nar

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

Bullhead 3-spined stickleback Brown / sea trout Pike Dace 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 →