Brown / sea trout · Salmo trutta

Brown / sea trout in the Itchen Navigation

Largest measured brown / sea trout: 64.3 cm

The largest brown / sea trout measured in Environment Agency surveys of the Itchen Navigation was 64.3 cm, recorded at Riverside Park on 20 October 2003.

Across 380 measured brown / sea trout, the median measured length was 16.7 cm.

Surveyors recorded weights for 27 brown / sea trout. The median was 1.1 oz (0.03 kg) and the largest recorded weight was 7 lb 10.4 oz (3.47 kg).

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

See brown / sea trout records across England →

Most recent observation27 October 2025Ham Farm · 21 fish

Largest measured brown / sea trout: 64.3 cm
Median length: 16.7 cm
Fish measured: 380
Survey locations: 3

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
64.3 cm	20 Oct 2003	Riverside Park	77789
60.3 cm	20 Sept 2005	Riverside Park	86392
58 cm	19 Sept 2002	Riverside Park	61480
43.9 cm	6 Sept 2011	Ham Farm	127925
41.1 cm	18 Sept 2015	Ham Farm	146671
40 cm	2 Sept 2022	Ham Farm	161452
39 cm	30 Aug 2023	Ham Farm	163752
36.2 cm	23 Aug 2017	Ham Farm	151345
35.1 cm	6 Sept 2011	Ham Farm	127925
35 cm	6 Sept 2011	Ham Farm	127925

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
Ham Farm	15 Aug 2002	27 Oct 2025	10
Riverside Park	19 Sept 2002	20 Sept 2005	3
Allbrook Lock	29 Sept 2003	3 Sept 2004	2

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.

202

203

104

105

006

007

008

109

010

111

012

113

014

115

016

117

018

119

020

021

122

123

024

125

Fish measured by surveyors

Measured length distribution

See how the 380 measured fish were spread across different length ranges.

Smallest: 6.4 cm
Lower quarter: 10.2 cm
Median: 16.7 cm
Upper quarter: 20.8 cm
Largest: 64.3 cm

0–99 mm

100–199 mm

188

200–299 mm

300–399 mm

400–499 mm

500–599 mm

600–699 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 27 brown / sea trout. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0.2 oz (0.006 kg)
Lower quarter: 0.5 oz (0.0145 kg)
Median: 1.1 oz (0.03 kg)
Upper quarter: 3.2 oz (0.0915 kg)
Heaviest: 7 lb 10.4 oz (3.47 kg)

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

More fish in this river

Explore the Itchen Navigation

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

European eel Pike Minnow Roach Grayling Atlantic salmon

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 →