RiverFish

Stone loach · Barbatula barbatula

Stone loach in the River Upper Ouse

Largest measured stone loach: 13.3 cm

The largest stone loach measured in Environment Agency surveys of the River Upper Ouse was 13.3 cm, recorded at Water Stratford on 21 June 1988.

Across 312 measured stone loach, the median measured length was 7.8 cm.

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the River Upper Ouse.

See stone loach records across England →

Most recent observation12 June 2025Passenham · 1 fish
Largest measured stone loach
13.3 cm
Median length
7.8 cm
Fish measured
312
Survey locations
30

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
13.3 cm21 Jun 1988Water Stratford28814
12.8 cm21 Jun 1988Westbury28813
12.8 cm21 Jun 1988Westbury28813
12.8 cm21 Jun 1988Westbury28813
12.8 cm21 Jun 1988Westbury28813
12.3 cm21 Jun 1988Westbury28813
12.3 cm21 Jun 1988Westbury28813
12.3 cm21 Jun 1988Westbury28813
12.3 cm21 Jun 1988Westbury28813
12.1 cm7 Aug 2012Brackley132675

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
Passenham14 Jul 198812 Jun 20254
Buckingham28 Mar 19943 Jun 20256
Westbury21 Jun 19889 Jul 20247
Water Stratford21 Jun 19885 Jun 20247
Brackley30 Sept 20084 Jun 20246
Oakley19 Oct 200130 Aug 202312
Clifton Reynes7 Nov 199716 Aug 20234
Thornborough Mill7 May 20099 Oct 20183
Stony Stratford Bypass Channel30 Jun 201613 Jun 20172
Newport Pagnell15 Nov 198829 Jul 201410
DS Wolverton Mill20 Aug 201320 Aug 20131
Mill Farm20 Apr 199413 Aug 20134
Manor Farm Cosgrove3 May 19946 Aug 20134
Mount Mill Farm9 Aug 19885 Aug 201312
Mill Farm Gayhurst5 Sept 200131 Jul 20136
DS Ravenstone Mill1 Sept 20111 Sept 20111
Kempston Mill6 Mar 199212 Aug 20112
Turvey18 Nov 19886 Aug 20104
Odell23 Jul 200923 Jul 20091
Whitfield1 Oct 20081 Oct 20081
Turweston1 Oct 20081 Oct 20081
Ravenstone Mill29 Jun 200423 Jul 20082
DS Passenham Weir19 Apr 199317 Apr 20082
Milton Ernest STW7 Sept 20047 Sept 20041
Falcon Inn Bletsoe6 Sept 20046 Sept 20041
Radclive Mill30 Apr 199730 Apr 19971
US Mill Farm17 Apr 199717 Apr 19971
Old Mill House Buckingham29 Mar 199414 Apr 19972
Carlton13 Oct 199413 Oct 19941
Sherrington27 Sept 199427 Sept 19941

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

1988–2025

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 312 measured fish were spread across different length ranges.

Smallest
2.5 cm
Lower quarter
6.5 cm
Median
7.8 cm
Upper quarter
9.4 cm
Largest
13.3 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Upper Ouse

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

Pike Perch Dace Roach Chub Gudgeon

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 →