Stone loach · Barbatula barbatula

Stone loach in the River Mersey

Largest measured stone loach: 8.7 cm

The largest stone loach measured in Environment Agency surveys of the River Mersey was 8.7 cm, recorded at Mrme10 on 6 August 2003.

Across 27 measured stone loach, the median measured length was 3.7 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 Mersey.

See stone loach records across England →

Most recent observation14 July 2006Mrme05 · 38 fish

Largest measured stone loach: 8.7 cm
Median length: 3.7 cm
Fish measured: 27
Survey locations: 3

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
8.7 cm	6 Aug 2003	Mrme10	76604
8.2 cm	6 Aug 2003	Mrme10	76604
8.2 cm	6 Aug 2003	Mrme10	76604
7.4 cm	6 Aug 2003	Mrme10	76604
7.4 cm	6 Aug 2003	Mrme10	76604
5.3 cm	6 Aug 2003	Mrme10	76604
4.6 cm	6 Aug 2003	Mrme10	76604
4.6 cm	6 Aug 2003	Mrme10	76604
4.2 cm	6 Aug 2003	Mrme10	76604
4.1 cm	6 Aug 2003	Mrme10	76604

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
Mrme11	27 Jun 2005	14 Jul 2006	2
Mrme05	2 Oct 2003	14 Jul 2006	3
Mrme10	6 Aug 2003	6 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.

2003–2006

Survey records by year

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

203

004

205

206

Fish measured by surveyors

Measured length distribution

See how the 27 measured fish were spread across different length ranges.

Smallest: 2.9 cm
Lower quarter: 3.5 cm
Median: 3.7 cm
Upper quarter: 4.6 cm
Largest: 8.7 cm

0–99 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Mersey

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

Gudgeon Roach 3-spined stickleback Chub Minnow Perch

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 →