Rainbow trout · Oncorhynchus mykiss

Rainbow trout in the Monksilver Stream

Largest measured rainbow trout: 26.8 cm

The largest rainbow trout measured in Environment Agency surveys of the Monksilver Stream was 26.8 cm, recorded at Downstream Catwell House on 25 October 1994.

Across 14 measured rainbow trout, the median measured length was 24.6 cm.

Surveyors recorded weights for 14 rainbow trout. The median was 6.6 oz (0.1865 kg) and the largest recorded weight was 8.5 oz (0.242 kg).

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

See rainbow trout records across England →

Most recent observation25 October 1994Downstream Catwell House · 11 fish

Largest measured rainbow trout: 26.8 cm
Median length: 24.6 cm
Fish measured: 14
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
26.8 cm	25 Oct 1994	Downstream Catwell House	79720
26.5 cm	25 Oct 1994	Downstream Catwell House	79720
26.2 cm	25 Oct 1994	Downstream Catwell House	79720
26.2 cm	25 Oct 1994	Downstream Catwell House	79720
26 cm	25 Oct 1994	Downstream Catwell House	79720
25.5 cm	25 Oct 1994	Downstream Catwell House	79720
25 cm	25 Oct 1994	Downstream Catwell House	79720
24.2 cm	25 Oct 1994	Downstream Catwell House	79720
24.2 cm	5 Oct 1994	Orchard Wyndham	79719
24.1 cm	25 Oct 1994	Downstream Catwell House	79720

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
Downstream Catwell House	25 Oct 1994	25 Oct 1994	1
Orchard Wyndham	5 Oct 1994	5 Oct 1994	1
Housepiece Copse	4 Oct 1994	4 Oct 1994	1

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

1994–1994

Survey records by year

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

394

Fish measured by surveyors

Measured length distribution

See how the 14 measured fish were spread across different length ranges.

Smallest: 21.2 cm
Lower quarter: 23.3 cm
Median: 24.6 cm
Upper quarter: 26.2 cm
Largest: 26.8 cm

200–299 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 14 rainbow trout. This is a subset of the measured fish and may not represent the whole population.

Lightest: 3 oz (0.084 kg)
Lower quarter: 4.4 oz (0.1258 kg)
Median: 6.6 oz (0.1865 kg)
Upper quarter: 7 oz (0.1975 kg)
Heaviest: 8.5 oz (0.242 kg)

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

More fish in this river

Explore the Monksilver Stream

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

Brown / sea trout Bullhead European eel 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 →