RiverFish

Brown / sea trout · Salmo trutta

Brown / sea trout in the River Arun

Largest measured brown / sea trout: 54.8 cm

The largest brown / sea trout measured in Environment Agency surveys of the River Arun was 54.8 cm, recorded at Stopham Bridge on 21 October 2025.

Across 20 measured brown / sea trout, the median measured length was 18.3 cm.

Surveyors recorded weights for 18 brown / sea trout. The median was 2.5 oz (0.0695 kg) and the largest recorded weight was 14.3 oz (0.404 kg).

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

See brown / sea trout records across England →

Most recent observation21 October 2025Stopham Bridge · 1 fish
Largest measured brown / sea trout
54.8 cm
Median length
18.3 cm
Fish measured
20
Survey locations
6

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
54.8 cm21 Oct 2025Stopham Bridge179497
32.8 cm24 Jul 2003Bucks Green76694
31.4 cm14 Aug 2006Chesworth Farm102216
28.6 cm30 Jul 2004Chesworth Farm80835
25.4 cm16 Aug 2002Bucks Green55291
24.7 cm21 Jul 2004Bucks Green80813
22.4 cm14 Aug 2006Chesworth Farm102216
20.6 cm30 Jul 2004Chesworth Farm80835
19.3 cm16 Jul 2003Chesworth Farm76631
18.3 cm26 Jul 2022Horsham Downstream Pack Horse Bridge161208

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
Stopham Bridge21 Oct 202521 Oct 20251
Horsham Downstream Pack Horse Bridge26 Jul 202226 Jul 20221
Chesworth Farm16 Jul 200314 Aug 20063
Gibbons Mill31 Jul 200221 Jul 20052
Roman Station26 Jul 200426 Jul 20041
Bucks Green16 Aug 200221 Jul 20043

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 20 measured fish were spread across different length ranges.

Smallest
4.9 cm
Lower quarter
16.9 cm
Median
18.3 cm
Upper quarter
24.9 cm
Largest
54.8 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 18 brown / sea trout. This is a subset of the measured fish and may not represent the whole population.

Lightest
0 oz (0.001 kg)
Lower quarter
2 oz (0.0555 kg)
Median
2.5 oz (0.0695 kg)
Upper quarter
5.7 oz (0.1602 kg)
Heaviest
14.3 oz (0.404 kg)

These are direct individual weights recorded by Environment Agency surveyors. Combined bulk weights are not included.

More fish in this river

Explore the River Arun

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

Roach Chub Gudgeon European eel Minnow Pike

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 →