Stone loach · Barbatula barbatula

Stone loach in the Monksilver Stream

Largest measured stone loach: 12 cm

The largest stone loach measured in Environment Agency surveys of the Monksilver Stream was 12 cm, recorded at Downstream Catwell House on 25 October 1994.

Across 4 measured stone loach, the median measured length was 9.8 cm.

Surveyors recorded weights for 4 stone loach. The median was 0.4 oz (0.01 kg) and the largest recorded weight was 0.6 oz (0.018 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 stone loach records across England →

Most recent observation15 June 1999Downstream of Williton

Largest measured stone loach: 12 cm
Median length: 9.8 cm
Fish measured: 4
Survey locations: 3

Individual EA measurements

Largest measured stone loach

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
12 cm	25 Oct 1994	Downstream Catwell House	79720
12 cm	25 Oct 1994	Downstream Catwell House	79720
7.5 cm	25 Oct 1994	Downstream Catwell House	79720
5.2 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 stone loach were found

Each point marks a survey location with at least one stone loach 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 stone loach
Downstream of Williton	15 Jun 1999	15 Jun 1999	1
Orchard Wyndham	8 Jun 1999	8 Jun 1999	1
Downstream Catwell House	25 Oct 1994	25 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.

1994–1999

Survey records by year

Each bar shows how many survey visits recorded stone loach that year.

194

095

096

097

098

299

Fish measured by surveyors

Measured length distribution

See how the 4 measured fish were spread across different length ranges.

Smallest: 5.2 cm
Lower quarter: 6.9 cm
Median: 9.8 cm
Upper quarter: 12 cm
Largest: 12 cm

0–99 mm

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 4 stone loach. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0.1 oz (0.002 kg)
Lower quarter: 0.1 oz (0.0035 kg)
Median: 0.4 oz (0.01 kg)
Upper quarter: 0.6 oz (0.0165 kg)
Heaviest: 0.6 oz (0.018 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 Rainbow trout

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 →