RiverFish

Stone loach · Barbatula barbatula

Stone loach in the River Colne

Largest measured stone loach: 13.5 cm

The largest stone loach measured in Environment Agency surveys of the River Colne was 13.5 cm, recorded at Elms Hall on 26 May 1999.

Across 1,345 measured stone loach, the median measured length was 8.2 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 observation16 June 2026Blue Bridge · 5 fish
Largest measured stone loach
13.5 cm
Median length
8.2 cm
Fish measured
1,345
Survey locations
28

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.

LengthSurvey dateSurvey locationSurvey ID
13.5 cm26 May 1999Elms Hall14015
13.3 cm28 Sept 1987Poole Street13922
13 cm26 May 1999Elms Hall14015
12.2 cm6 Jun 2014Brook Street Farm141592
12.2 cm26 May 1999Elms Hall14015
12.1 cm3 May 1984Poole Street13896
12 cm7 Jun 2011Brook Street Farm126422
12 cm28 Sept 1987Poole Street13922
12 cm3 May 1984Poole Street13896
11.8 cm8 Jun 2023Downstream New Bridge162726

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 surveyedFirst recordedLast recordedVisits finding stone loach
Blue Bridge7 Sept 199016 Jun 20269
Brook Street Farm10 Sept 198710 Jun 20269
Box Mill11 Apr 19843 Jun 202610
Wakes Colne Viaduct30 Apr 19992 Jun 202615
Fordstreet28 Apr 199914 May 20269
Earls Colne FGS13 Apr 19846 May 202619
Cooks Mill7 Aug 198728 Apr 20269
Downstream New Bridge17 May 19848 Jun 20239
Broom House25 Aug 19937 Jun 20239
Chalkney Mill19 May 19992 Jun 20236
Cricket Ground11 May 201024 May 20235
Spring Lane22 Apr 199626 Apr 20179
Maplestead Mill10 Apr 198411 Jun 20147
Nunnery Bridge15 Jul 20029 Jun 20145
Upstream A12 Bridge (Silver eel)6 Jan 20126 Jan 20121
Lexden FGS Upstream (Silver eel)6 Jan 20126 Jan 20121
The Hedinghams1 Jul 200515 Jun 20112
North Bridge4 May 200512 May 20116
Poole Street3 May 198419 Jun 20084
Swanscombe Farm3 May 199618 Jun 20085
Halstead24 Sept 198710 Jun 20085
Earls Colne Mill20 May 19996 Jun 20082
Elms Hall26 May 19995 Jun 20084
Fiddlers Mill11 Aug 19872 Jun 20084
Upstream A12 Bridge23 Apr 199613 May 20085
Bathing Pool22 May 19849 May 20084
Castle Park7 May 20087 May 20081
Upstream Blue Bridge16 Sept 199316 Sept 19931

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

1984–2026

Survey records by year

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

Fish measured by surveyors

Measured length distribution

See how the 1,345 measured fish were spread across different length ranges.

Smallest
2.5 cm
Lower quarter
7 cm
Median
8.2 cm
Upper quarter
9.2 cm
Largest
13.5 cm

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.

Roach European eel Gudgeon Dace Pike 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 →