Rainbow trout · Oncorhynchus mykiss

Rainbow trout in the Main Semington Brook

Largest measured rainbow trout: 44.5 cm

The largest rainbow trout measured in Environment Agency surveys of the Main Semington Brook was 44.5 cm, recorded at Hurst Farm on 14 May 1997.

Across 44 measured rainbow trout, the median measured length was 26 cm.

Surveyors recorded weights for 44 rainbow trout. The median was 7.7 oz (0.218 kg) and the largest recorded weight was 2 lb 0.5 oz (0.92 kg).

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

See rainbow trout records across England →

Most recent observation6 September 2001Hurst Farm · 25 fish

Largest measured rainbow trout: 44.5 cm
Median length: 26 cm
Fish measured: 44
Survey locations: 3

Individual EA measurements

Largest measured rainbow 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
44.5 cm	14 May 1997	Hurst Farm	77207
39.2 cm	6 Sept 2001	Hurst Farm	20243
34 cm	14 May 1997	Hurst Farm	77207
33.6 cm	2 Aug 2001	Norney Bridge	20200
33.5 cm	2 Aug 2001	Norney Bridge	20200
33.1 cm	2 Aug 2001	Norney Bridge	20200
32.3 cm	14 May 1997	Hurst Farm	77207
32 cm	14 May 1997	Hurst Farm	77207
31.2 cm	2 Aug 2001	Norney Bridge	20200
30.3 cm	14 May 1997	Hurst Farm	77207

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where rainbow trout were found

Each point marks a survey location with at least one rainbow 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 rainbow trout
Hurst Farm	14 May 1997	6 Sept 2001	2
Norney Bridge	2 Aug 2001	2 Aug 2001	1
Worton	10 Jul 1997	10 Jul 1997	1

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

1997–2001

Survey records by year

Each bar shows how many survey visits recorded rainbow trout that year.

297

098

099

000

201

Fish measured by surveyors

Measured length distribution

See how the 44 measured fish were spread across different length ranges.

Smallest: 7 cm
Lower quarter: 20.8 cm
Median: 26 cm
Upper quarter: 29.1 cm
Largest: 44.5 cm

0–99 mm

100–199 mm

200–299 mm

300–399 mm

400–499 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 44 rainbow trout. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0.1 oz (0.004 kg)
Lower quarter: 4.4 oz (0.124 kg)
Median: 7.7 oz (0.218 kg)
Upper quarter: 9.9 oz (0.281 kg)
Heaviest: 2 lb 0.5 oz (0.92 kg)

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

More fish in this river

Explore the Main Semington Brook

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

Brown / sea trout Roach Gudgeon Stone loach Dace Minnow

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 →