RiverFish

Stone loach · Barbatula barbatula

Stone loach in the River Stour

Largest measured stone loach: 12.7 cm

The largest stone loach measured in Environment Agency surveys of the River Stour was 12.7 cm, recorded at Kedington FGS on 21 August 2009.

Across 810 measured stone loach, the median measured length was 8.1 cm.

Surveyors recorded weights for 15 stone loach. The median was 0.1 oz (0.004 kg) and the largest recorded weight was 0.3 oz (0.009 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 Stour.

See stone loach records across England →

Most recent observation14 July 2026Tendring Hall · 1 fish
Largest measured stone loach
12.7 cm
Median length
8.1 cm
Fish measured
810
Survey locations
42

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
12.7 cm21 Aug 2009Kedington FGS120665
12.5 cm18 Sept 1997Great Bradley (headwater)13714
12.3 cm18 Sept 1997Great Bradley (headwater)13714
12.2 cm17 Oct 2006Great Bradley (headwater)101962
12.2 cm18 Sept 1997Great Bradley (headwater)13714
12.1 cm18 Sept 1997Great Bradley (headwater)13714
12 cm18 Sept 1997Great Bradley (headwater)13714
12 cm18 Sept 1997Great Bradley (headwater)13714
12 cm18 Sept 1997Great Bradley (headwater)13714
12 cm18 Sept 1997Great Bradley (headwater)13714

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
Tendring Hall25 Jul 201214 Jul 20266
Mill Meadow16 Aug 201611 Aug 20253
Bures Mill29 Jul 19975 Aug 202514
Fen Bridge23 Sept 199415 Jul 202514
Rats Castle16 Nov 199423 Sept 202412
Great Thurlow25 Sept 198018 Sept 20243
Anchor Bridge25 Jul 20015 Sept 202414
Bower Hall8 Sept 20033 Sept 20247
Kedington Radial Gate15 Oct 198528 Aug 20245
Mill Farm Clare14 Nov 199423 Aug 20249
Bush Boake Allen27 Oct 199414 Aug 20248
Wormingford Mill25 Oct 19947 Aug 20245
Pentlow Mill27 Aug 199731 Jul 20248
Pitmire A31 Aug 201226 Jul 20245
Wiston Mill24 Jul 200617 Jul 20243
Higham Hall7 Jul 200612 Jul 202310
Liston Mill26 Sept 19855 Oct 20188
Baythorne End26 Sept 200320 Sept 20182
Stratford6 Jul 200622 Jun 20184
Shalford Weir24 Aug 20129 Aug 20163
Wixoe Pumping Station16 Sept 20091 Sept 20152
Lamarsh FGS A10 Aug 200622 Jul 20132
Wissington10 Oct 199410 Jul 20139
Bures Bridge A13 Jul 20119 Jul 20132
Boxted Mill12 Jul 200629 Aug 20124
Downstream Dedham Mill4 Jul 200623 Jul 20122
Langham Intake4 Jul 20033 Aug 20105
Bakers Mill A21 Jun 200429 Jul 20107
Little Thurlow25 Sept 198028 Sept 20095
Little Wratting2 Oct 19808 Sept 20095
Pentlow Street18 Oct 198821 Aug 20096
Kedington FGS1 Nov 198821 Aug 20096
Wick Farm3 Jul 20093 Jul 20091
Great Bradley (headwater)18 Sept 199717 Oct 20064
Mill Green Radial Gate25 Oct 198827 Sept 20063
Glemsford Pits22 Aug 200622 Aug 20061
Rodbridge Park18 Aug 200618 Aug 20061
Garnons Farm11 Jul 200325 Jul 20062
Flatford Mill28 Jun 200628 Jun 20061
Clare Mill10 Sept 200310 Sept 20031
Shalford Meadow1 Aug 20031 Aug 20031
Stanch Farm B18 Nov 198118 Nov 19811

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

1980–2026

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 810 measured fish were spread across different length ranges.

Smallest
2 cm
Lower quarter
7.2 cm
Median
8.1 cm
Upper quarter
9.1 cm
Largest
12.7 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 15 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 (0.002 kg)
Median
0.1 oz (0.004 kg)
Upper quarter
0.2 oz (0.007 kg)
Heaviest
0.3 oz (0.009 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 Stour

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

Roach European eel Perch Pike Chub Dace

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 →