RiverFish

Stone loach · Barbatula barbatula

Stone loach in the River Blackwater

Largest measured stone loach: 11.9 cm

The largest stone loach measured in Environment Agency surveys of the River Blackwater was 11.9 cm, recorded at Landford on 15 September 2006.

Across 17 measured stone loach, the median measured length was 9.2 cm.

Surveyors recorded weights for 17 stone loach. The median was 0.2 oz (0.005 kg) and the largest recorded weight was 1.4 oz (0.04 kg).

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

See stone loach records across England →

Most recent observation18 September 2025Landford · 7 fish
Largest measured stone loach
11.9 cm
Median length
9.2 cm
Fish measured
17
Survey locations
5

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
11.9 cm15 Sept 2006Landford101352
11.6 cm15 Sept 2006Landford101352
11.1 cm5 Aug 2005Landford86383
10.4 cm5 Aug 2005Landford86383
10.4 cm5 Aug 2005Landford86383
10.3 cm5 Aug 2005Landford86383
10.3 cm5 Aug 2005Landford86383
10.1 cm5 Aug 2005Landford86383
9.2 cm15 Sept 2006Landford101352
8.7 cm15 Sept 2006Landford101352

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
Landford4 Sept 200218 Sept 202513
Broadlands Fishery3 Sept 201816 Sept 20257
Lower Bridge Farm31 Jul 201231 Jul 20121
Upper Whinwhistle20 Sept 201120 Sept 20111
Lower Whinwhistle28 Jul 201128 Jul 20111

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 stone loach that year.

Fish measured by surveyors

Measured length distribution

See how the 17 measured fish were spread across different length ranges.

Smallest
5 cm
Lower quarter
7.3 cm
Median
9.2 cm
Upper quarter
10.4 cm
Largest
11.9 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 17 stone loach. This is a subset of the measured fish and may not represent the whole population.

Lightest
0 oz (0.001 kg)
Lower quarter
0.1 oz (0.003 kg)
Median
0.2 oz (0.005 kg)
Upper quarter
0.3 oz (0.009 kg)
Heaviest
1.4 oz (0.04 kg)

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

More fish in this river

Explore the River Blackwater

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

Roach Bullhead European eel Dace Brown / sea trout 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 →