RiverFish

Brown / sea trout · Salmo trutta

Brown / sea trout in the River Main Yealm

Largest measured brown / sea trout: 65 cm

The largest brown / sea trout measured in Environment Agency surveys of the River Main Yealm was 65 cm, recorded at Treby Ham on 3 August 2004.

Across 3,391 measured brown / sea trout, the median measured length was 11 cm.

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

See brown / sea trout records across England →

Most recent observation28 August 2025Treby Ham · 25 fish
Largest measured brown / sea trout
65 cm
Median length
11 cm
Fish measured
3,391
Survey locations
32

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.

LengthSurvey dateSurvey locationSurvey ID
65 cm3 Aug 2004Treby Ham81318
58.3 cm22 Jul 2014Potsons Wood141859
55 cm8 Aug 2019Treby Ham155692
55 cm7 Aug 2002Treby Ham72328
52.8 cm21 Aug 2015Treby Ham146030
52 cm16 Aug 2016Potsons Wood149004
51.6 cm23 Aug 2012Puslinch Bridge132978
50 cm13 Aug 2013Treby Ham137862
49.7 cm18 Jul 2005Treby Ham86464
49.2 cm22 Jul 2014Potsons Wood141859

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 surveyedFirst recordedLast recordedVisits finding brown / sea trout
Treby Ham7 Aug 200228 Aug 202517
Putta Pool3 Aug 200215 Aug 202518
Woodburn Farm28 Sept 202324 Sept 20242
Challonsleigh17 Sept 201424 Sept 20243
Yealmpton5 Oct 202328 Aug 20242
Yealmbridge28 Sept 202328 Aug 20242
Puslinch Bridge5 Aug 200214 Aug 202414
Downstream Puslinch Br31 Aug 202314 Aug 20242
Potsons Wood6 Aug 20025 Aug 202415
Downstream Potsons Wood18 Aug 20235 Aug 20242
Upstream Treby Ham18 Jul 202418 Jul 20241
Downstream South Hele10 Oct 202318 Jul 20242
Downstream Putta Pool9 Aug 202318 Jul 20242
South Hele2 Aug 20028 Aug 202211
Upstream Mackarell Parks Wood Stream17 Sept 201417 Sept 20141
Upstream Lee Mill STW Pumping Station17 Sept 201417 Sept 20141
Upstream Hitchcombe Tributary17 Sept 201417 Sept 20141
Downstream Strashleigh Hams Landfill Site17 Sept 201417 Sept 20141
Downstream Hitchcombe Unidentified Outfall17 Sept 201417 Sept 20141
Yealmpton Mill19 Aug 20022 Sept 20144
u/s Dendles Wood4 Aug 200427 Aug 20143
Southwood Wood19 Aug 20025 Aug 20143
U/s Worston Mill Footbridge6 Aug 20126 Aug 20121
70m d/s Yealmpton Mill EF site6 Aug 20126 Aug 20121
50m u/s Yealmpton Mill EF site6 Aug 20126 Aug 20121
20m d/s Yealm Bridge6 Aug 20126 Aug 20121
200m u/s Long Brook confluence6 Aug 20126 Aug 20121
u/s Blachford Lake15 Aug 200814 Oct 20103
Dendles Wood20 Jul 20046 Aug 20093
Fernfires Wood15 Aug 200815 Aug 20081
d/s Blachford Lake21 Sept 20053 Aug 20062
Woodburn3 Aug 20063 Aug 20061

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

2002–2025

Survey records by year

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

Fish measured by surveyors

Measured length distribution

See how the 3,391 measured fish were spread across different length ranges.

Smallest
3.2 cm
Lower quarter
7 cm
Median
11 cm
Upper quarter
15.3 cm
Largest
65 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Main Yealm

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

Atlantic salmon European eel Bullhead Minnow Brook lamprey Flounder

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 →