European eel · Anguilla anguilla

European eel in the Black Brook

Largest measured european eel: 45.5 cm

The largest european eel measured in Environment Agency surveys of the Black Brook was 45.5 cm, recorded at Dedham on 17 February 2004.

Across 7 measured european eel, the median measured length was 39.5 cm.

Surveyors recorded weights for 7 european eel. The median was 3.8 oz (0.108 kg) and the largest recorded weight was 5.9 oz (0.168 kg).

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

See european eel records across England →

Most recent observation27 January 2010Dedham · 1 fish

Largest measured european eel: 45.5 cm
Median length: 39.5 cm
Fish measured: 7
Survey locations: 2

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
45.5 cm	17 Feb 2004	Dedham	79473
44.2 cm	18 Feb 2004	Nightingales	79474
42.5 cm	18 Feb 2004	Nightingales	79474
39.5 cm	17 Feb 2004	Dedham	79473
39 cm	17 Feb 2004	Dedham	79473
20 cm	18 Feb 2004	Nightingales	79474
14.5 cm	27 Jan 2010	Dedham	121173

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
Dedham	1 Apr 1997	27 Jan 2010	3
Nightingales	1 Apr 1997	18 Feb 2004	2

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

1997–2010

Survey records by year

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

297

098

099

000

001

002

003

204

005

006

007

008

009

110

Fish measured by surveyors

Measured length distribution

See how the 7 measured fish were spread across different length ranges.

Smallest: 14.5 cm
Lower quarter: 29.5 cm
Median: 39.5 cm
Upper quarter: 43.4 cm
Largest: 45.5 cm

100–199 mm

200–299 mm

300–399 mm

400–499 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 7 european eel. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0.1 oz (0.004 kg)
Lower quarter: 1.7 oz (0.049 kg)
Median: 3.8 oz (0.108 kg)
Upper quarter: 4.8 oz (0.135 kg)
Heaviest: 5.9 oz (0.168 kg)

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

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 →