Brown / sea trout · Salmo trutta

Brown / sea trout in the Great Eau FMU

Largest measured brown / sea trout: 42.6 cm

The largest brown / sea trout measured in Environment Agency surveys of the Great Eau FMU was 42.6 cm, recorded at DS Claythorpe Mill on 23 October 2015.

Across 743 measured brown / sea trout, the median measured length was 18.3 cm.

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

See brown / sea trout records across England →

Most recent observation18 July 2024Belleau Spring · 7 fish

Largest measured brown / sea trout: 42.6 cm
Median length: 18.3 cm
Fish measured: 743
Survey locations: 5

Individual EA measurements

Largest measured brown / sea trout

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
42.6 cm	23 Oct 2015	DS Claythorpe Mill	147559
41.8 cm	19 Apr 1995	Claythorpe Gauging Station	57795
36.1 cm	29 Sept 1995	Claythorpe Gauging Station	58101
34.7 cm	29 Sept 1995	Claythorpe Gauging Station	58101
34.5 cm	1 Jun 2022	Claythorpe Gauging Station	160992
34.3 cm	29 Sept 1995	Claythorpe Gauging Station	58101
33.8 cm	29 Sept 1995	Claythorpe Gauging Station	58101
33.2 cm	18 Aug 1986	Belleau Spring	57754
32.6 cm	19 Jul 1994	Claythorpe Gauging Station	58076
32.5 cm	2 Jun 2022	Withern Road Bridge	160994

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

Explore the river

Where brown / sea trout were found

Each point marks a survey location with at least one brown / sea trout 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 brown / sea trout
Belleau Spring	18 Aug 1986	18 Jul 2024	10
Withern Road Bridge	9 Sept 1994	2 Jun 2022	3
Claythorpe Gauging Station	18 Oct 1989	1 Jun 2022	8
Woods Farm	18 Aug 1986	1 Jun 2018	8
DS Claythorpe Mill	23 Oct 2015	30 May 2018	2

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

1986–2024

Survey records by year

Each bar shows how many survey visits recorded brown / sea trout that year.

286

087

088

389

090

091

292

093

294

495

096

097

098

099

000

001

002

303

004

005

006

207

008

009

010

011

112

313

014

215

016

017

318

019

020

121

222

023

124

Fish measured by surveyors

Measured length distribution

See how the 743 measured fish were spread across different length ranges.

Smallest: 5.6 cm
Lower quarter: 12.5 cm
Median: 18.3 cm
Upper quarter: 23.7 cm
Largest: 42.6 cm

0–99 mm

100–199 mm

364

200–299 mm

276

300–399 mm

400–499 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Great Eau FMU

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

European eel 3-spined stickleback Stone loach Roach 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 →