Stone loach · Barbatula barbatula

Stone loach in the River Allen (East & West)

Largest measured stone loach: 10.7 cm

The largest stone loach measured in Environment Agency surveys of the River Allen (East & West) was 10.7 cm, recorded at River East Allen at Sinderhope on 16 July 2008.

Across 76 measured stone loach, the median measured length was 8.6 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 Allen (East & West).

See stone loach records across England →

Most recent observation3 July 2025River east Allen at Catton Bridge

Largest measured stone loach: 10.7 cm
Median length: 8.6 cm
Fish measured: 76
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.

Length	Survey date	Survey location	Survey ID
10.7 cm	16 Jul 2008	River East Allen at Sinderhope	113522
10.6 cm	12 Jul 2009	River east Allen at Catton Bridge	120980
10.5 cm	16 Jul 2008	River East Allen at Sinderhope	113522
10.4 cm	12 Jul 2009	River east Allen at Catton Bridge	120980
10.4 cm	12 Jul 2009	River east Allen at Catton Bridge	120980
10.3 cm	12 Jul 2009	River east Allen at Catton Bridge	120980
10.2 cm	16 Jul 2008	River east Allen at Catton Bridge	113376
10.1 cm	16 Jul 2008	River east Allen at Catton Bridge	113376
10 cm	12 Jul 2009	River east Allen at Catton Bridge	120980
9.8 cm	12 Jul 2009	River east Allen at Catton Bridge	120980

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 surveyed	First recorded	Last recorded	Visits finding stone loach
River east Allen at Catton Bridge	4 Sept 1995	3 Jul 2025	14
River Allen at Ridley Hall	23 Sept 2008	4 Sept 2023	8
Blaeberry Burn	4 Sept 2011	1 Sept 2023	3
Swinhope Burn at Burnmouth	21 Sept 2005	29 Aug 2023	4
Knockshield Burn	29 Aug 2023	29 Aug 2023	1
East Allen at Peasmeadows	22 Aug 2006	29 Aug 2023	2
West Allen at ninebanks	28 Jul 2017	3 Sept 2019	3
Oakeydene Burn	3 Aug 2017	3 Aug 2017	1
River East Allen at Sinderhope	30 Aug 2005	24 Jul 2014	3
Carrs Burn	21 Sept 2005	21 Sept 2005	1
River Allen at Plankey Mill	27 Jul 1995	12 Sept 2005	2
Church Burn	7 Sept 2005	7 Sept 2005	1
River east Allen at Wide Eals	30 Aug 2005	30 Aug 2005	1
River East Allen at Tedham	30 Aug 2005	30 Aug 2005	1

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

1995–2025

Survey records by year

Each bar shows how many survey visits recorded stone loach that year.

295

096

097

098

099

000

001

002

003

004

805

106

107

308

209

210

211

212

013

314

015

016

617

118

219

020

021

222

623

124

125

Fish measured by surveyors

Measured length distribution

See how the 76 measured fish were spread across different length ranges.

Smallest: 5.1 cm
Lower quarter: 8.2 cm
Median: 8.6 cm
Upper quarter: 9.4 cm
Largest: 10.7 cm

0–99 mm

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Allen (East & West)

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

Brown / sea trout European eel Atlantic salmon Minnow

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 →