RiverFish

Stone loach · Barbatula barbatula

Stone loach in the River Wandle

Largest measured stone loach: 15 cm

The largest stone loach measured in Environment Agency surveys of the River Wandle was 15 cm, recorded at Church Road on 2 July 2015.

Across 524 measured stone loach, the median measured length was 10.4 cm.

Surveyors recorded weights for 11 stone loach. The median was 0.6 oz (0.018 kg) and the largest recorded weight was 0.9 oz (0.026 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 Wandle.

See stone loach records across England →

Most recent observation8 October 2025Watermeads Lane · 1 fish
Largest measured stone loach
15 cm
Median length
10.4 cm
Fish measured
524
Survey locations
15

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
15 cm2 Jul 2015Church Road145433
14.9 cm28 Jun 2017Church Road150708
14.5 cm1 Mar 1994Watermeads Lane116868
14.4 cm28 Jun 2017Church Road150708
14.2 cm28 Jun 2017Church Road150708
14.2 cm1 Mar 1994Watermeads Lane116868
14.2 cm1 Mar 1994Watermeads Lane116868
14.2 cm21 Jul 1988Hackbridge116827
14.1 cm7 Jul 2021Church Road160154
14 cm8 Oct 2025Hackbridge179731

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
Watermeads Lane1 Mar 19948 Oct 20252
Hackbridge21 Jul 19888 Oct 202519
Mapleton Road18 Jun 20097 Oct 20257
Waterside Way15 Jun 20092 Oct 20257
Sainsburys Merton8 Jun 20111 Oct 20255
Ravensbury Park22 Jul 198830 Sept 20258
Phipps Bridge12 Jun 200930 Sept 20255
Church Road30 May 20075 Jul 20239
Butterhill3 Mar 19945 Jul 20233
Trewint Street - Weir Road15 Jun 200911 Jun 20133
King George Park27 Jul 198811 Jun 201311
Upstream Beddington Park Lake14 Mar 201214 Mar 20121
Corbet Close22 Oct 200822 Oct 20081
North road, Colliers Wood27 Jul 198917 Jul 19973
Goat Bridge, Beddington22 Jul 198822 Jul 19881

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

1988–2025

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 524 measured fish were spread across different length ranges.

Smallest
2.5 cm
Lower quarter
7.4 cm
Median
10.4 cm
Upper quarter
11.8 cm
Largest
15 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 11 stone loach. This is a subset of the measured fish and may not represent the whole population.

Lightest
0.4 oz (0.01 kg)
Lower quarter
0.5 oz (0.014 kg)
Median
0.6 oz (0.018 kg)
Upper quarter
0.7 oz (0.021 kg)
Heaviest
0.9 oz (0.026 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 Wandle

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

3-spined stickleback European eel Chub Roach Dace Bullhead

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 →