Brown / sea trout · Salmo trutta

Brown / sea trout in the Dulas Brook - Hay

Largest measured brown / sea trout: 25.3 cm

The largest brown / sea trout measured in Environment Agency surveys of the Dulas Brook - Hay was 25.3 cm, recorded at W110j on 10 August 2021.

Across 170 measured brown / sea trout, the median measured length was 11.3 cm.

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

See brown / sea trout records across England →

Most recent observation10 August 2021W110j · 53 fish

Largest measured brown / sea trout: 25.3 cm
Median length: 11.3 cm
Fish measured: 170
Survey locations: 4

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
25.3 cm	10 Aug 2021	W110j	160184
24 cm	27 Aug 2008	W110j	115908
21.7 cm	10 Aug 2021	W110j	160184
21.7 cm	14 Aug 2014	W110j	144124
21.7 cm	27 Aug 2008	W110j	115908
21.6 cm	10 Aug 2021	W110j	160184
21.2 cm	15 Aug 2012	Hd1	132895
21 cm	10 Aug 2021	W110j	160184
20.9 cm	14 Aug 2014	W110j	144124
20.7 cm	10 Aug 2021	W110j	160184

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
W110j	28 Apr 1998	10 Aug 2021	5
W110k	28 Apr 1998	14 Aug 2014	4
Hd1	15 Aug 2012	15 Aug 2012	1
W110p	23 Sept 1997	23 Sept 1997	1

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

1997–2021

Survey records by year

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

197

298

099

000

001

002

203

004

005

006

007

108

009

010

111

112

013

214

015

016

017

018

019

020

121

Fish measured by surveyors

Measured length distribution

See how the 170 measured fish were spread across different length ranges.

Smallest: 2.9 cm
Lower quarter: 7 cm
Median: 11.3 cm
Upper quarter: 15.8 cm
Largest: 25.3 cm

0–99 mm

100–199 mm

200–299 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Dulas Brook - Hay

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

Atlantic salmon 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 →