RiverFish

Stone loach · Barbatula barbatula

Stone loach in the River Ivel

Largest measured stone loach: 12.6 cm

The largest stone loach measured in Environment Agency surveys of the River Ivel was 12.6 cm, recorded at Henlow on 11 May 2016.

Across 282 measured stone loach, the median measured length was 8.3 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 Ivel.

See stone loach records across England →

Most recent observation8 October 2025Henlow · 1 fish
Largest measured stone loach
12.6 cm
Median length
8.3 cm
Fish measured
282
Survey locations
10

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
12.6 cm11 May 2016Henlow148033
11 cm7 Jul 2004Henlow80346
10.8 cm15 Mar 1989Astwick29244
10.8 cm13 Mar 1989Henlow29245
10.6 cm17 May 2016Biggleswade Common148034
10.6 cm14 Jun 2013Biggleswade Common136397
10.5 cm24 Jun 2013Gt Ouse Confluence136568
10.5 cm4 Jun 2013DS Iron Bridge136221
10.3 cm8 May 2013Henlow135961
10.3 cm13 Mar 1989Henlow29245

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
Henlow13 Mar 19898 Oct 202515
Biggleswade Common11 Jun 200229 Apr 202511
DS Iron Bridge23 Jul 19989 Apr 202511
Girtford Weir3 Aug 199810 Jun 20169
Gt Ouse Confluence12 May 200824 Jun 20134
Langford Mill26 Nov 200926 Nov 20091
High Romper Bridge12 May 199513 May 20053
Langford Nursery2 May 199529 Apr 20052
Henlow Control Site3 May 20003 May 20001
Astwick15 Mar 198927 May 19984

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

1989–2025

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 282 measured fish were spread across different length ranges.

Smallest
3.6 cm
Lower quarter
7.3 cm
Median
8.3 cm
Upper quarter
9 cm
Largest
12.6 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Ivel

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

Chub Pike Roach Gudgeon Dace 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 →