European eel · Anguilla anguilla

European eel in the Croasdale Beck

Largest measured european eel: 60 cm

The largest european eel measured in Environment Agency surveys of the Croasdale Beck was 60 cm, recorded at Slaidburn on 9 August 2013.

Across 119 measured european eel, the median measured length was 29 cm.

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

See european eel records across England →

Most recent observation27 August 2025Slaidburn · 1 fish

Largest measured european eel: 60 cm
Median length: 29 cm
Fish measured: 119
Survey locations: 5

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
60 cm	9 Aug 2013	Slaidburn	137901
58 cm	9 Aug 2013	Slaidburn	137901
56 cm	5 Aug 2022	Slaidburn	161255
55 cm	1 Aug 2005	Slaidburn	87152
53 cm	3 Aug 2004	Shay House	82973
52 cm	25 Oct 2007	Slaidburn	108802
51 cm	18 Aug 1993	Croasdale Pages Farm	112882
51 cm	18 Aug 1993	Croasdale Pages Farm	112882
50 cm	27 Aug 2025	Slaidburn	178100
50 cm	9 Aug 2013	Slaidburn	137901

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
Slaidburn	1 Sept 1998	27 Aug 2025	17
Shay House	17 Aug 1993	27 Jul 2015	4
100M Upstream Bridge	4 Sept 1998	4 Sept 1998	1
Croasdale ptc Laneshaw Brook	27 Sept 1993	27 Sept 1993	1
Croasdale Pages Farm	18 Aug 1993	18 Aug 1993	1

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

1993–2025

Survey records by year

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

393

094

095

096

097

298

099

000

001

102

003

204

105

106

107

108

209

010

111

012

113

114

215

116

017

118

019

020

121

122

023

024

125

Fish measured by surveyors

Measured length distribution

See how the 119 measured fish were spread across different length ranges.

Smallest: 6.7 cm
Lower quarter: 22.5 cm
Median: 29 cm
Upper quarter: 40 cm
Largest: 60 cm

0–99 mm

100–199 mm

200–299 mm

300–399 mm

400–499 mm

500–599 mm

600–699 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Croasdale Beck

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

Brown / sea trout Atlantic salmon

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 →