European eel · Anguilla anguilla

European eel in the By Brook main river

Largest measured european eel: 70 cm

The largest european eel measured in Environment Agency surveys of the By Brook main river was 70 cm, recorded at Weavern (Se-03) on 20 April 1999.

Across 24 measured european eel, the median measured length was 52.2 cm.

Surveyors recorded weights for 15 european eel. The median was 11.7 oz (0.333 kg) and the largest recorded weight was 1 lb 7.8 oz (0.674 kg).

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

See european eel records across England →

Most recent observation9 October 2018Middlehill · 4 fish

Largest measured european eel: 70 cm
Median length: 52.2 cm
Fish measured: 24
Survey locations: 6

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.

Length	Survey date	Survey location	Survey ID
70 cm	20 Apr 1999	Weavern (Se-03)	23126
68 cm	20 Apr 1999	Weavern (Se-03)	23126
67.8 cm	8 Jul 2003	Weavern (Se-03)	76357
65.5 cm	14 Apr 1999	Long Dean	23123
65 cm	9 Oct 2018	Middlehill	153631
59.5 cm	20 Apr 1999	Weavern (Se-03)	23126
59 cm	9 Oct 2018	Middlehill	153631
58 cm	14 Apr 1999	Long Dean	23123
57 cm	14 Apr 1999	Long Dean	23123
55 cm	12 Sept 2013	D/s Bathford Paper mill	138671

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 surveyed	First recorded	Last recorded	Visits finding european eel
Middlehill	20 Sept 2012	9 Oct 2018	2
D/s Bathford Paper mill	12 Sept 2013	12 Sept 2013	1
Weavern (Se-03)	20 Apr 1999	8 Jul 2003	2
Castle Combe Golf Course (Se-02)	8 Apr 1999	8 Aug 2002	2
Slaughterford	15 Apr 1999	15 Apr 1999	1
Long Dean	14 Apr 1999	14 Apr 1999	1

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

1999–2018

Survey records by year

Each bar shows how many survey visits recorded european eel that year.

499

000

001

102

103

004

005

006

007

008

009

010

011

112

113

014

015

016

017

118

Fish measured by surveyors

Measured length distribution

See how the 24 measured fish were spread across different length ranges.

Smallest: 25 cm
Lower quarter: 43 cm
Median: 52.3 cm
Upper quarter: 59.1 cm
Largest: 70 cm

200–299 mm

300–399 mm

400–499 mm

500–599 mm

600–699 mm

700–799 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 15 european eel. This is a subset of the measured fish and may not represent the whole population.

Lightest: 1.5 oz (0.042 kg)
Lower quarter: 7.8 oz (0.2215 kg)
Median: 11.7 oz (0.333 kg)
Upper quarter: 15.1 oz (0.4285 kg)
Heaviest: 1 lb 7.8 oz (0.674 kg)

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

More fish in this river

Explore the By Brook main river

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

Brown / sea trout Bullhead 3-spined stickleback Minnow Stone loach Brook lamprey

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 →