RiverFish

Stone loach · Barbatula barbatula

Stone loach in the River Derwent

Largest measured stone loach: 11.6 cm

The largest stone loach measured in Environment Agency surveys of the River Derwent was 11.6 cm, recorded at Cromford on 19 August 2014.

Across 204 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 River Derwent.

See stone loach records across England →

Most recent observation17 September 2025Darley Abbey Net · 1 fish
Largest measured stone loach
11.6 cm
Median length
5.8 cm
Fish measured
204
Survey locations
17

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
11.6 cm19 Aug 2014Cromford142855
10.5 cm2 Sept 2010Cromford123983
10.4 cm3 Jul 2013Cromford137104
10.1 cm19 Jul 2016Cromford148548
9.7 cm6 Sept 2018Cromford153195
9.7 cm19 Aug 2014Cromford142855
9.6 cm3 Jul 2013Cromford137104
9.6 cm2 Sept 2010Cromford123983
9.5 cm19 Jul 2016Cromford148548
9.5 cm3 Jul 2013Cromford137104

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
Darley Abbey Net17 Sept 202517 Sept 20251
Nooning Lane Net29 Sept 201019 Sept 20243
Duffield Bridge4 Sept 201426 Aug 20223
Cromford Willersley Castle Salmon parr26 Aug 202226 Aug 20221
Cromford4 May 20056 Sept 20188
Nooning Lane23 Sept 200824 Aug 20175
Chub Alley1 Jul 201025 Jul 20173
Cromford Salmon Parr4 Sept 20143 Oct 20163
Borrowash Fish Pass Pool125 Feb 201616 Sept 20162
Borrowash Fish Pass Pool 226 Feb 201626 Feb 20161
Raynesway Weir Pool25 Sept 201525 Sept 20151
Borrowash Black Weir25 Sept 201525 Sept 20151
DS Longbridge Weir4 Sept 201414 Sept 20152
Peckwash Mill1 Sept 20101 Sept 20101
Hathersage15 Jun 200512 Jun 20093
Baslow15 Jun 200515 Jun 20051
Church Wilne29 Aug 199429 Aug 19941

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

1994–2025

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 204 measured fish were spread across different length ranges.

Smallest
2.4 cm
Lower quarter
4.2 cm
Median
5.8 cm
Upper quarter
8 cm
Largest
11.6 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Derwent

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

Brown / sea trout Bullhead Minnow Grayling Chub 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 →