RiverFish

Stone loach · Barbatula barbatula

Stone loach in the River Mole

Largest measured stone loach: 11.1 cm

The largest stone loach measured in Environment Agency surveys of the River Mole was 11.1 cm, recorded at Meath Green Farm, Horley on 10 September 2015.

Across 165 measured stone loach, the median measured length was 7.4 cm.

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

See stone loach records across England →

Most recent observation29 July 2025Castlefields · 11 fish
Largest measured stone loach
11.1 cm
Median length
7.4 cm
Fish measured
165
Survey locations
21

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
11.1 cm10 Sept 2015Meath Green Farm, Horley146524
10.2 cm10 Sept 2015Meath Green Farm, Horley146524
10.1 cm14 Oct 2015Downstream Gatwick147327
10 cm25 Jun 2025Stoke D'Abernon177058
9.9 cm24 Jun 2025Downstream Downside Mill177059
9.9 cm14 Oct 2015Downstream Gatwick147327
9.5 cm17 Jul 2025Norbury Park, Near Mickleham178708
9.5 cm3 Jul 2025Downstream Painshill178707
9.5 cm24 Jun 2025Downstream Downside Mill177059
9.5 cm24 Jun 2025Downstream Downside Mill177059

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
Castlefields29 Jul 202529 Jul 20251
Norbury Park, Near Mickleham15 Oct 198517 Jul 20256
Downstream Painshill23 Oct 20073 Jul 20257
Stoke D'Abernon25 Jun 202525 Jun 20251
Downstream Downside Mill25 Feb 199324 Jun 20256
Horley Swimming Baths17 Jul 199214 Nov 20175
Box Hill11 Feb 199320 Oct 201511
Downstream Gatwick17 Sept 198514 Oct 20157
Meath Green Farm, Horley1 Oct 199230 Sept 20159
Randalls Road, Leatherhead18 Feb 199318 Sept 20134
Flanchford Farm5 Sept 200217 Sept 20135
Below Downside Bridge, Cobham.14 Nov 198519 Oct 20054
Povey Cross Enhancement Scheme20 Aug 200220 Aug 20021
Below Granthams Bridge, Lambs Green27 Jul 199327 Jul 19931
Norwood Farm Downstream Cobham9 Mar 19939 Mar 19931
Upstream Sidlow Bridge18 May 198918 May 19891
Upstream Horley STW19 Sept 198516 May 19892
Upstream M25 at Stoke D'Abernon (Left Arm)23 Oct 198623 Oct 19861
Old Mole Channel20 Jun 198620 Jun 19861
Downstream Brockham Bridge8 Oct 19858 Oct 19851
Burys Court School, Upstream Flanchford Bridge1 Oct 19851 Oct 19851

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

1985–2025

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 165 measured fish were spread across different length ranges.

Smallest
2.2 cm
Lower quarter
6.3 cm
Median
7.4 cm
Upper quarter
8 cm
Largest
11.1 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Mole

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

Roach Dace Chub Gudgeon 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 →