RiverFish

Stone loach · Barbatula barbatula

Stone loach in the Boulters Weir Stream

Largest measured stone loach: 8.6 cm

The largest stone loach measured in Environment Agency surveys of the Boulters Weir Stream was 8.6 cm, recorded at Boulters Weir Downstream Fry on 21 August 2024.

Across 8 measured stone loach, the median measured length was 5 cm.

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

See stone loach records across England →

Most recent observation4 September 2025Boulters Weir Upstream Fry · 1 fish
Largest measured stone loach
8.6 cm
Median length
5 cm
Fish measured
8
Survey locations
2

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.

LengthSurvey dateSurvey locationSurvey ID
8.6 cm21 Aug 2024Boulters Weir Downstream Fry166641
7.5 cm27 Aug 2013Boulters Weir Upstream Fry138565
5.7 cm4 Sept 2025Boulters Weir Upstream Fry178509
5.2 cm4 Sept 2025Boulters Weir Downstream Fry178508
4.9 cm4 Sept 2025Boulters Weir Downstream Fry178508
4.7 cm31 Aug 2006Boulters Weir Upstream Fry111831
4.4 cm31 Aug 2006Boulters Weir Downstream Fry111832
3.1 cm18 Aug 2015Boulters Weir Downstream Fry146045

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 surveyedFirst recordedLast recordedVisits finding stone loach
Boulters Weir Upstream Fry7 Sept 20044 Sept 20254
Boulters Weir Downstream Fry31 Aug 20064 Sept 20254

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 stone loach that year.

Fish measured by surveyors

Measured length distribution

See how the 8 measured fish were spread across different length ranges.

Smallest
3.1 cm
Lower quarter
4.6 cm
Median
5.1 cm
Upper quarter
6.2 cm
Largest
8.6 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Boulters Weir Stream

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

Minnow Dace Roach Bleak Chub Gudgeon

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 →