Stone loach · Barbatula barbatula

Stone loach in the By Brook main river

Largest measured stone loach: 13 cm

The largest stone loach measured in Environment Agency surveys of the By Brook main river was 13 cm, recorded at Middlehill on 9 October 2018.

Across 88 measured stone loach, the median measured length was 5.8 cm.

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the By Brook main river.

See stone loach records across England →

Most recent observation11 October 2018Weavern (Se-03) · 74 fish

Largest measured stone loach: 13 cm
Median length: 5.8 cm
Fish measured: 88
Survey locations: 7

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 cm	9 Oct 2018	Middlehill	153631
12.6 cm	9 Oct 2018	Middlehill	153631
12.1 cm	20 Sept 2012	Middlehill	133739
11.3 cm	11 Oct 2018	Weavern (Se-03)	153701
11.1 cm	11 Oct 2018	Weavern (Se-03)	153701
11.1 cm	11 Oct 2018	Weavern (Se-03)	153701
10.9 cm	11 Oct 2018	Weavern (Se-03)	153701
10.8 cm	20 Sept 2012	Middlehill	133739
10.6 cm	11 Oct 2018	Weavern (Se-03)	153701
10.6 cm	11 Oct 2018	Weavern (Se-03)	153701

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
Weavern (Se-03)	20 Apr 1999	11 Oct 2018	3
Middlehill	20 Sept 2012	9 Oct 2018	2
D/s Bathford Paper mill	12 Sept 2013	12 Sept 2013	1
Castle Combe Golf Course (Se-02)	8 Aug 2002	8 Aug 2002	1
Drewett's Mill	13 May 1999	13 May 1999	1
Slaughterford	15 Apr 1999	15 Apr 1999	1
Long Dean	14 Apr 1999	14 Apr 1999	1

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

1999–2018

Survey records by year

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

499

000

001

102

003

004

005

006

007

008

009

110

011

112

113

014

015

016

017

218

Fish measured by surveyors

Measured length distribution

See how the 88 measured fish were spread across different length ranges.

Smallest: 3.1 cm
Lower quarter: 5 cm
Median: 5.8 cm
Upper quarter: 8.9 cm
Largest: 13 cm

0–99 mm

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the By Brook main river

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

Brown / sea trout Bullhead 3-spined stickleback Minnow European eel Brook lamprey

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 →