RiverFish

Brown / sea trout · Salmo trutta

Brown / sea trout in the River Seph

Largest measured brown / sea trout: 39.8 cm

The largest brown / sea trout measured in Environment Agency surveys of the River Seph was 39.8 cm, recorded at Stable Holme on 10 August 2011.

Across 1,021 measured brown / sea trout, the median measured length was 10.8 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 Seph.

See brown / sea trout records across England →

Most recent observation11 September 2024R.Seph, Laskill Bridge DERBT51 · 24 fish
Largest measured brown / sea trout
39.8 cm
Median length
10.8 cm
Fish measured
1,021
Survey locations
8

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
39.8 cm10 Aug 2011Stable Holme127962
32.3 cm3 Sept 2012R.Seph, Laskill Bridge DERBT51133543
32.3 cm17 Aug 2012R.Seph d/s Fangdale beck conf.133139
28.5 cm27 Jun 2006R.Seph d/s Fangdale beck conf.102572
28.5 cm27 Jun 2006Raisdale beck at Chop Gate102570
27.6 cm3 Sept 2012R.Seph, Laskill Bridge DERBT51133543
27.1 cm3 Sept 2012R.Seph, Laskill Bridge DERBT51133543
25.7 cm17 Aug 2012Stable Holme133128
25.5 cm27 Jun 2006R.Seph, Laskill Bridge DERBT51102569
25.5 cm27 Jun 2006Bilsdale beck at Chop Gate102561

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
R.Seph, Laskill Bridge DERBT5110 Sept 199711 Sept 202412
Raisdale beck at Chop Gate27 Jun 200610 Sept 20245
R.Seph d/s Fangdale beck conf.27 Jun 200610 Sept 20243
Ledge beck27 Jun 200610 Sept 20244
Bilsdale beck at Chop Gate27 Jun 200610 Sept 20246
Fangdale beck27 Jun 200613 Aug 20193
Stable Holme10 Aug 201117 Aug 20122
R.Seph u/s R.Rye28 Jun 200628 Jun 20061

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

1997–2024

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 1,021 measured fish were spread across different length ranges.

Smallest
3.7 cm
Lower quarter
6.7 cm
Median
10.8 cm
Upper quarter
14.2 cm
Largest
39.8 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Seph

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

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 →