RiverFish

Stone loach · Barbatula barbatula

Stone loach in the River Arun

Largest measured stone loach: 12 cm

The largest stone loach measured in Environment Agency surveys of the River Arun was 12 cm, recorded at Gibbons Mill on 21 July 2005.

Across 535 measured stone loach, the median measured length was 8 cm.

Surveyors recorded weights for 448 stone loach. The median was 0.1 oz (0.004 kg) and the largest recorded weight was 0.5 oz (0.013 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 Arun.

See stone loach records across England →

Most recent observation10 September 2025Crosby Farm · 2 fish
Largest measured stone loach
12 cm
Median length
8 cm
Fish measured
535
Survey locations
14

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
12 cm21 Jul 2005Gibbons Mill86967
11.3 cm16 Aug 2002Bucks Green55291
11.2 cm21 Jul 2005Gibbons Mill86967
11 cm21 Jul 2005Gibbons Mill86967
11 cm24 Jul 2003Bucks Green76694
10.9 cm2 Aug 2005Horsham-by-Pass sq87015
10.9 cm6 Aug 2004Gibbons Mill81299
10.5 cm24 Jul 2003Bucks Green76694
10.4 cm12 Sept 2007Pallingham107215
10.2 cm21 Jul 2005Gibbons Mill86967

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
Crosby Farm10 Sept 202510 Sept 20251
Pallingham12 Sept 20078 Jul 20255
Alfoldean Weir Upstream12 Jul 202412 Jul 20241
Roman Station30 Jul 200226 Jul 201612
Theale Farm9 Sept 20149 Sept 20141
Bignor Farm1 Aug 20054 Sept 20143
Chesworth Farm, Downstream Chesworth House20 Sept 201220 Sept 20121
Bucks Green16 Aug 200227 Sept 20076
Chesworth Farm2 Aug 200214 Aug 20065
Gibbons Mill31 Jul 200226 Jul 20065
Violets Farm sq8 Sept 20058 Sept 20051
Horsham-by-Pass sq2 Aug 20052 Aug 20051
Horsham STW1 Aug 200213 Aug 20043
Newbridge30 Jul 20022 Aug 20043

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 535 measured fish were spread across different length ranges.

Smallest
3.5 cm
Lower quarter
7.3 cm
Median
8 cm
Upper quarter
8.6 cm
Largest
12 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 448 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
0.1 oz (0.004 kg)
Upper quarter
0.2 oz (0.005 kg)
Heaviest
0.5 oz (0.013 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 Arun

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

Roach Chub Gudgeon European eel Minnow Pike

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 →