Stone loach · Barbatula barbatula

Stone loach in the River Ouse

Largest measured stone loach: 13.3 cm

The largest stone loach measured in Environment Agency surveys of the River Ouse was 13.3 cm, recorded at Upper Ryelands on 15 August 2001.

Across 161 measured stone loach, the median measured length was 8.9 cm.

Surveyors recorded weights for 94 stone loach. The median was 0.2 oz (0.007 kg) and the largest recorded weight was 0.8 oz (0.024 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 Ouse.

See stone loach records across England →

Most recent observation14 August 2024Newick · 1 fish

Largest measured stone loach: 13.3 cm
Median length: 8.9 cm
Fish measured: 161
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.

Length	Survey date	Survey location	Survey ID
13.3 cm	15 Aug 2001	Upper Ryelands	51865
12.6 cm	17 Aug 2004	Upper Ryelands	81344
12.5 cm	17 Aug 2004	Upper Ryelands	81344
12.5 cm	15 Aug 2001	Upper Ryelands	51865
12.4 cm	8 Sept 2006	Upper Ryelands	102558
12.3 cm	8 Sept 2006	Upper Ryelands	102558
12.3 cm	11 Aug 2003	Cherry lane	77044
12.2 cm	10 Aug 2005	Upper Ryelands	86810
12.1 cm	24 Jul 2024	Sloop	165937
12 cm	17 Aug 2004	Upper Ryelands	81344

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
Newick	17 Sept 2007	14 Aug 2024	6
Fletching Mill Upstream	11 Jul 2011	25 Jul 2024	5
Sloop	1 Aug 2003	24 Jul 2024	5
East Mascalls Bridge	23 Aug 2004	24 Jul 2024	7
Slaugham	12 Sept 2018	12 Sept 2018	1
Isfield Church	31 Aug 2004	30 Jun 2016	3
Sheffield Bridge	20 Aug 2002	14 Sept 2015	7
Upper Ryelands	15 Aug 2001	1 Oct 2013	8
Sutton Hall Weir Downstream	26 Oct 2011	26 Oct 2011	1
Sloop Weir Upstream	25 Oct 2011	25 Oct 2011	1
Sloop Weir Downstream	25 Oct 2011	25 Oct 2011	1
Anchor Weir	7 Sept 2011	7 Sept 2011	1
Fletching Mill Downstream	20 Oct 2010	20 Oct 2010	1
Sharpsbridge	20 Aug 2004	20 Aug 2004	1
Cherry lane	11 Aug 2003	11 Aug 2003	1

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

2001–2024

Survey records by year

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

101

202

403

504

205

206

307

208

209

210

511

012

513

014

515

116

217

118

019

020

021

022

123

424

Fish measured by surveyors

Measured length distribution

See how the 161 measured fish were spread across different length ranges.

Smallest: 3.8 cm
Lower quarter: 7.8 cm
Median: 8.9 cm
Upper quarter: 10.2 cm
Largest: 13.3 cm

0–99 mm

112

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 94 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: 0.2 oz (0.005 kg)
Median: 0.2 oz (0.007 kg)
Upper quarter: 0.4 oz (0.01 kg)
Heaviest: 0.8 oz (0.024 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 Ouse

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

European eel Perch Roach Dace Gudgeon Chub

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 →