Roach · Rutilus rutilus

Roach in the Louth Canal

Largest measured roach: 33.2 cm

The largest roach measured in Environment Agency surveys of the Louth Canal was 33.2 cm, recorded at Firebeacon on 6 September 1995.

Across 9,977 measured roach, the median measured length was 9 cm.

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

See roach records across England →

Most recent observation15 May 2018Tetney Lock · 198 fish

Largest measured roach: 33.2 cm
Median length: 9 cm
Fish measured: 9,977
Survey locations: 7

Individual EA measurements

Largest measured roach

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
33.2 cm	6 Sept 1995	Firebeacon	58045
31.4 cm	6 Sept 1995	Firebeacon	58045
30.6 cm	7 Sept 1995	Thoresby Bridge	58046
30 cm	8 Sept 1995	Tetney Lock	58047
29.6 cm	13 May 2010	Tetney Lock	121712
29.5 cm	13 Jun 1986	Firebeacon	58019
29.4 cm	5 Sept 1995	Austen Fen	58044
28.9 cm	8 Sept 1995	Tetney Lock	58047
28.8 cm	18 Jun 1999	Tetney Lock	58061
28.5 cm	13 May 2010	Tetney Lock	121712

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where roach were found

Each point marks a survey location with at least one roach 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 roach
Tetney Lock	10 Jun 1986	15 May 2018	8
Alvingham High Bridge	11 May 2010	14 May 2018	3
Thoresby Bridge	9 Jun 1986	17 Jun 2015	5
Firebeacon	13 Jun 1986	16 Jun 2015	8
Austen Fen	13 Jun 1986	16 Jun 1999	4
Brian Halls Mill	23 Jun 1992	23 Jun 1992	1
Covenham Reservoir Intake	12 Jun 1986	12 Jun 1986	1

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

1986–2018

Survey records by year

Each bar shows how many survey visits recorded roach that year.

586

087

088

089

090

091

492

093

094

495

096

097

098

499

000

001

002

003

204

005

006

007

008

009

310

011

312

013

014

315

016

017

218

Fish measured by surveyors

Measured length distribution

See how the 9,977 measured fish were spread across different length ranges.

Smallest: 3 cm
Lower quarter: 7.1 cm
Median: 9 cm
Upper quarter: 13 cm
Largest: 33.2 cm

0–99 mm

5982

100–199 mm

3731

200–299 mm

260

300–399 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Louth Canal

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

European eel 3-spined stickleback Gudgeon Perch Pike Dace

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 →