Stone loach · Barbatula barbatula

Stone loach in the River Colne

Largest measured stone loach: 12.6 cm

The largest stone loach measured in Environment Agency surveys of the River Colne was 12.6 cm, recorded at Stoney Battery Lane on 22 July 2013.

Across 559 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 Colne.

See stone loach records across England →

Most recent observation27 August 2025Lees Mill lane

Largest measured stone loach: 12.6 cm
Median length: 8.6 cm
Fish measured: 559
Survey locations: 8

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
12.6 cm	22 Jul 2013	Stoney Battery Lane	139683
12.5 cm	22 Jul 2013	Lees Mill lane	139676
12.3 cm	4 Aug 2012	DS Slaithewaite Park	133235
12.1 cm	22 Jul 2013	Stoney Battery Lane	139683
11.9 cm	22 Jul 2013	Stoney Battery Lane	139683
11.8 cm	25 Aug 2015	Stafford Mills	146171
11.8 cm	22 Jul 2013	Stoney Battery Lane	139683
11.8 cm	4 Aug 2012	Slaithewaite park footbridge	133236
11.7 cm	26 Aug 2015	Holme Mills	146184
11.6 cm	27 Aug 2015	Lees Mill lane	146319

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
Lees Mill lane	23 Sept 2003	27 Aug 2025	15
Holme Mills	22 Jul 2013	26 Aug 2015	2
Stafford Mills	7 Sept 2010	25 Aug 2015	2
Stoney Battery Lane	4 Aug 2012	22 Jul 2013	2
Titanic Mill	4 Jun 2010	4 Aug 2012	2
Slaithewaite park footbridge	4 Jun 2010	4 Aug 2012	2
DS Slaithewaite Park	4 Jun 2010	4 Aug 2012	2
Pollard Street	23 Sept 2003	23 Sept 2003	1

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

2003–2025

Survey records by year

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

203

004

105

006

107

008

009

610

111

512

413

014

315

016

117

018

119

020

121

022

123

024

125

Fish measured by surveyors

Measured length distribution

See how the 559 measured fish were spread across different length ranges.

Smallest: 3.1 cm
Lower quarter: 7.6 cm
Median: 8.6 cm
Upper quarter: 9.5 cm
Largest: 12.6 cm

0–99 mm

473

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Colne

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

Brown / sea trout Grayling 3-spined stickleback Minnow Bullhead

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 →