European eel · Anguilla anguilla

European eel in the Knowl Water

Largest measured european eel: 36.8 cm

The largest european eel measured in Environment Agency surveys of the Knowl Water was 36.8 cm, recorded at Knowl Water Bridge (Sp) on 15 August 2019.

Across 21 measured european eel, the median measured length was 17.5 cm.

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

See european eel records across England →

Most recent observation17 June 2025Knowl Water Bridge (Sp) · 3 fish

Largest measured european eel: 36.8 cm
Median length: 17.5 cm
Fish measured: 21
Survey locations: 3

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
36.8 cm	15 Aug 2019	Knowl Water Bridge (Sp)	155125
34.6 cm	15 Aug 2019	Knowl Water Bridge (Sp)	155125
32 cm	2 Jul 2018	Knowl Water Bridge (Sp)	152802
29 cm	2 Jul 2018	Knowl Water Bridge (Sp)	152802
27 cm	2 Jul 2018	Knowl Water Bridge (Sp)	152802
25.1 cm	6 Jul 2012	Knowl Water Bridge (Sp)	132305
23 cm	17 Jun 2025	Knowl Water Bridge (Sp)	176951
21.3 cm	15 Aug 2019	Knowl Water Bridge (Sp)	155125
19 cm	15 Aug 2019	Footpath Ash lane	155180
19 cm	15 Aug 2019	Knowl Water Bridge (Sp)	155125

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
Knowl Water Bridge (Sp)	10 Sept 1996	17 Jun 2025	5
Footpath Ash lane	15 Aug 2019	15 Aug 2019	1
Wrafton (Sp)*	17 Sept 1999	17 Sept 1999	1

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

1996–2025

Survey records by year

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

196

097

098

199

000

001

002

003

004

005

006

007

008

009

010

011

112

013

014

015

016

017

118

219

020

021

022

023

024

125

Fish measured by surveyors

Measured length distribution

See how the 21 measured fish were spread across different length ranges.

Smallest: 9.5 cm
Lower quarter: 15 cm
Median: 17.5 cm
Upper quarter: 25.1 cm
Largest: 36.8 cm

0–99 mm

100–199 mm

200–299 mm

300–399 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Knowl Water

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

Brown / sea trout Bullhead

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 →