RiverFish

Brown / sea trout · Salmo trutta

Brown / sea trout in the River Tonge

Largest measured brown / sea trout: 39.2 cm

The largest brown / sea trout measured in Environment Agency surveys of the River Tonge was 39.2 cm, recorded at Crto05 on 29 June 2004.

Across 66 measured brown / sea trout, the median measured length was 17.4 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 Tonge.

See brown / sea trout records across England →

Most recent observation1 October 2025Crto05 · 23 fish
Largest measured brown / sea trout
39.2 cm
Median length
17.4 cm
Fish measured
66
Survey locations
2

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
39.2 cm29 Jun 2004Crto0581657
38.6 cm29 Jun 2004Crto0581657
29.5 cm27 Jul 2011Crto05127160
26.7 cm7 Jun 2005Crto1084896
26.4 cm27 Jul 2011Crto05127160
25.5 cm27 Jul 2011Crto05127160
25.4 cm1 Oct 2025Crto05180252
25.3 cm27 Jul 2011Crto05127160
25 cm1 Oct 2025Crto05180252
24.9 cm27 Jul 2011Crto05127160

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
Crto0529 Jun 20041 Oct 20254
Crto1028 Jun 20047 Jun 20052

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

2004–2025

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 66 measured fish were spread across different length ranges.

Smallest
9 cm
Lower quarter
12.8 cm
Median
17.4 cm
Upper quarter
21.1 cm
Largest
39.2 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Tonge

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

Bullhead Minnow Stone loach

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 →