RiverFish

Stone loach · Barbatula barbatula

Stone loach in the River Nidd

Largest measured stone loach: 16.6 cm

The largest stone loach measured in Environment Agency surveys of the River Nidd was 16.6 cm, recorded at Lofthouse d/s on 15 August 2011.

Across 601 measured stone loach, the median measured length was 8.1 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 Nidd.

See stone loach records across England →

Most recent observation21 August 2025Lofthouse d/s
Largest measured stone loach
16.6 cm
Median length
8.1 cm
Fish measured
601
Survey locations
18

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
16.6 cm15 Aug 2011Lofthouse d/s129119
12 cm8 Sept 2021Lofthouse d/s160334
12 cm21 Aug 2013Lofthouse d/s138502
11.8 cm1 Sept 2015Lofthouse d/s146322
11.6 cm21 Aug 2013Summerbridge138495
11.5 cm21 Aug 2013Summerbridge138495
11.5 cm15 Aug 2011Lofthouse d/s129119
11.4 cm15 Aug 2011Lofthouse d/s129119
11.4 cm15 Aug 2011Lofthouse d/s129119
11.3 cm21 Aug 2013Lofthouse d/s138502

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
Lofthouse d/s19 Sept 200121 Aug 202517
Kirk Hammerton - Fry Survey23 Sept 198613 Aug 20256
Moor Monkton17 Jul 202517 Jul 20251
Knaresborough Bypass26 Aug 20039 Jul 202516
Ribston Park (NEW 2018)3 Jul 20198 Jul 20254
Cowthorpe23 Aug 20027 Jul 202516
Scotton Mill14 Jun 200512 Sept 20245
Summerbridge9 Jun 20054 Sept 20245
Ribston Park26 Aug 20033 Jul 201914
Conyngham Hall28 Sept 201528 Sept 20151
u/s Pately Bridge30 Oct 200124 Sept 20153
d/s Glasshouse WTW13 Jun 20059 Sept 20152
u/s Hampsthwaite Bridge9 Jun 20057 Sept 20153
Birstwith13 Jun 20057 Sept 20153
Goldsborough22 Jul 201522 Jul 20151
Kirk Hammerton21 Aug 20023 Aug 20125
Nun Monkton9 Aug 20059 Aug 20051
Killinghall14 Jun 200514 Jun 20051

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

1986–2025

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 601 measured fish were spread across different length ranges.

Smallest
2.5 cm
Lower quarter
6.8 cm
Median
8.1 cm
Upper quarter
9.2 cm
Largest
16.6 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Nidd

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

Minnow Bullhead Grayling Brown / sea trout European eel 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 →